AMAZON
20 Years in Ecommerce: 47 Hard-Won Lessons.
Dave Sherwin • June 26, 2026 • 13 min read
I’ve been selling online long enough to remember doing video marketing before YouTube existed. I built a social media following with a Friendster strategy (google it).
I’ve watched “email is dead” run as a headline at least a thousand times — and email is still here, still printing money for anyone who bothers to use it.
Twenty years in ecommerce will do that to you. You stop chasing every headline and start noticing what actually holds up.
Hype cycles come and go. Platforms rise and die. Tactics that print money this year are worthless next year. But underneath all of it, a handful of principles just keep proving true.
This is my list. Not theory I read in a book — lessons I paid for, usually the hard way, building my own brands and now helping other brands grow through Mohaus.
Some of these cost me real money to learn. A few cost me more than that. All of them I’d hand to any founder starting out today.
It’s long, and it’s in no particular order — just the way they come to mind, which is honestly closer to how they matter in real life. Grab a coffee. Here are 47 things two decades taught me.
1. Product is everything
In 20 years, I’ve never seen great marketing save a mediocre product. You can buy attention, but you can’t buy a second purchase. If your product isn’t demonstrably better than most of its competitors, upgrade it right now. You cannot build a long-term business on a generic product.
2. Social marketing is about 90% vanity and 10% business-effective
Most of what gets celebrated — follower counts, likes, “going viral” — has almost no connection to revenue. But that 10% is real and worth finding. The whole trick is being honest about which is which, and spending your time accordingly.
3. Protect your cash. Make small bets before you go all in
Early on, I’d fall in love with a marketing channel, go big, and find out it didn’t work — after the money was gone. Now every new channel, product, or campaign starts as a small bet. Spend a little, get real data, then decide whether to pour fuel on it. Cash is oxygen: you can recover from a bad campaign, but not from running out of air.
4. Survive long enough to get lucky
Most “overnight successes” are a decade deep. The single biggest predictor of success I’ve seen isn’t brilliance — it’s still being in business when your lucky break finally shows up.
5. People are assets, not liabilities
Be slow to hire and quick to fire, but treat every employee and contractor with respect and, yes, love. If I’m not careful, I get very transactional with people. But the longer I do this the harder I try to be caring and thoughtful.
6. The marketers selling you stuff only show you their best campaign examples
The case study they publish may be the one winner out of 99 attempts that flopped. When you see a tactic working in someone’s ad, remember you’re looking at survivorship bias. Read every marketing claim with that in mind.
7. Never run out of inventory
You never know when something is going to get really hot, so be prepared. A stockout at the wrong moment doesn’t just cost you the sales you missed — on Amazon it can tank your ranking and hand momentum straight to a competitor.
8. Own your audience — email, physical address, and text
“Email is dead” has been wrong for 20 years and counting. Why? Because you own your email list. You don’t own a single one of your social followers — you rent them from an algorithm that can change the rules tomorrow. Build the assets you control.
9. Technology always wins — so lead it, don't resist it
Years ago I met the economist Paul Zane Pilzer, and he told me something I’ve never forgotten: technology always wins, so be a leader in it. Don’t fall for every shiny object, but be a thought leader in the technology that matters and stay ahead of your competitors. That was true then; with AI it’s screaming-loud true now. If someone refused to use a computer, they’d be unemployable. “I don’t use AI” is heading to the exact same place. You don’t have to love it — but you do have to be fluent in it.
10. You will never finish your todo list — and that's fine
But there is at least one thing every single day that is the most important thing you can do. Start your day with that, before anything else. Build a business one needle-mover at a time, and given enough days, you’ll build something incredible. Every morning ask “what’s the one thing I could do today that is so powerful that if I did nothing else this would be a successful day?” Then, do that thing, then anything else you have time for.
11. Retention beats acquisition
The first sale often costs more than the ad that got it. The profit lives in the second purchase, maybe the third. A business built only on new customers is a treadmill; a business built on repeat customers compounds.
12. Virality is a myth
Enough people succeed with it to ruin the judgment of the thousands who never will. If your marketing relies on external algorithms you don’t control, you don’t have a real business — you have a lottery ticket.
13. Read your 1-, 2-, and 3-star reviews like a treasure map
That’s your product roadmap, written for free by people who bought your product. Five-star reviews feel good; the critical ones tell you exactly what to fix next.
14. You don't need a fancy office
Go low-rent, simple, second-hand furniture. Never forget that Jeff Bezos used doors on sawhorses as desks for years before he became a billionaire. Put your cash into the things that grow the business, not the things that impress visitors.
15. Whoever can afford to spend the most to acquire a customer wins
This is an LTV game, not an ad-budget game. The brand that knows its numbers and has the margin to outbid everyone for the same customer wins — even with a smaller budget — because they’re playing a smarter game.
16. Listen to the people who ask you the right annoying questions
My wife isn’t a business expert, but she knows the exact right annoying questions to ask that make me rethink a bad idea before I commit to it. Everyone needs that person. Find yours, and actually listen.
17. Make a good freaking product, and the reviews take care of themselves
Reviews are critical, so here’s the simple version: if you’re gaming the system to get good reviews, you’re fighting a losing battle. Reviews are just the scoreboard; they reflect the product underneath. If you want five-star reviews, be absolutely sure you have a five-star product.
18. Very few businesses have more than one or two truly effective marketing methods
Choose no more than three, and put most of your effort into the one that works best for you. Spreading yourself across every channel and method produces a lot of activity and very little traction.
19. Startup costs much more than you think
Whatever amount of money you project you’ll need, double it. I’ve never once met a founder who spent less than they planned. Not pessimism, just survival.
20. Consistency compounds
Boring, done daily, beats brilliant done haphazardly. The unglamorous habit you keep for two years will outperform the heroic effort you abandon after two weeks. Almost everything good in business comes from compounding.
21. Fix the leaky bucket before you add traffic
Doubling your conversion rate is almost always cheaper than doubling your ad spend. Pouring more traffic into a page that doesn’t convert just wastes money faster. Plug the leaks first.
22. Competition is validation
An empty market is usually empty for a reason. Established competitors are proof there’s demand and money to be made. Your job isn’t to find a market no one’s in — it’s to be better than the ones who are already there.
23. Hire for your weaknesses, not your comfort zone
It’s tempting to hire people who think like you and do what you’re already good at. Resist it. The hires that change your business are the ones who are strong exactly where you’re weak.
24. Find your own voice
Every brand has something unique — in the product, the people, or the story. Find it, own it, and monetize it. Generic brands compete on price and lose; distinctive brands succeed.
25. On Amazon, account health is the whole business
One policy strike can vaporize years of work overnight. Protecting your account health isn’t an admin task — it’s existential. Guard it like you guard your cash.
26. Watch contribution margin, not revenue
Vanity revenue has killed more brands than slow growth ever has. Big top-line numbers feel great right up until you realize you’re going broke profitably-on-paper. Margin is the number that keeps you alive.
27. A better main image beats a bigger ad budget
On Amazon especially, the main image is the pitch. I’ve watched a single photo upgrade do more for sales than thousands in extra ad spend. Get the listing fundamentals right before you scale the budget.
28. Document everything
You can’t scale, sell, or step away from a business that only exists inside your head. The systems you write down are the difference between owning a business and owning a job.
29. Beware shiny-object syndrome
Master one channel before you flirt with the next. The founder who’s “kind of doing” five platforms is usually losing to the one who’s genuinely great at a single one.
30. The riches are in the niches
Be unmissable to a few thousand people rather than forgettable to millions. A tightly defined audience that feels like you built the product just for them will outperform a broad, bland appeal every time.
31. Know your true unit economics before you scale
Scaling a product that loses money on every sale doesn’t fix the problem — it just loses money faster. Know your real, all-in cost per unit before you pour gas on the fire.
32. Identify and track your top 5 competitors
Don’t plagiarize them — study them. Use their listings, content, and reviews to turn your own listings and storyboards into something demonstrably better than all of them. It’s the best free product-development feedback you’ll ever get.
33. One clear message beats three clever ones
When you try to say everything, you say nothing. Pick the single most important thing and say it so plainly no one can misunderstand it. Clarity converts; cleverness mostly entertains the person who wrote it.
34. Your health is a business asset
Tired, unfit, depleted founders make tired, unfit, depleted decisions. I say this as someone who’s spent as much of my life on fitness and nutrition as on business: how you treat your body shows up directly in the quality of your thinking. Protect it.
35. Organic rank is downstream of conversion and velocity
PPC primes the pump, but the listing has to close. You don’t buy your way to the top of Amazon and stay there — you earn rank by converting the traffic you get and selling at a healthy clip. Fix conversion, and rank follows.
36. Copy the principle, never the tactic
By the time you can see a specific tactic working in the wild, it’s already burning out. Understand why it worked — the underlying principle — and apply that to your own situation. Principles last; tactics expire.
37. Your brand is what people say about you when you're not in the room
You don’t fully control your brand — you earn it, through every product, every interaction, every promise kept or broken. Act like the reputation you want is being decided right now, because it is.
38. Raise your prices before you think you can
Most brands underprice out of fear, then discover they can’t afford to grow because there’s no margin to reinvest. You almost always have more pricing room than your nerves are telling you.
39. Know your unique selling proposition, and infuse it into everything you do
Your USP isn’t a tagline you write once and forget. It belongs in every listing, every ad, every email, every touchpoint. Consistency is what turns a product into a brand.
40. Returns are a lesson, not an annoyance
When somebody returns a product, dig in and learn why. Correct the problem, if possible, and keep your return rates lower than industry standards. You can’t eliminate them, but they should be lower than your competitors.
41. Never depend on a single channel
If Amazon is your only source of revenue, then Amazon owns your business — not you. Diversify your channels so no single platform holds your entire livelihood hostage.
42. Done beats perfect
Ship it, then fix it with real data from real customers. Perfection is just procrastination in a nicer outfit. The market will teach you more in a week than another month of polishing ever will.
43. There are no cookie-cutter marketing methods
What worked for somebody else may not work for you. What works for you right now may not work in six months. Ecommerce is a game of constant experimentation and iteration — the moment you stop testing, you start falling behind.
44. Your supply chain is your business
A great product you can’t reliably ship doesn’t actually exist. The least glamorous part of ecommerce — sourcing, logistics, fulfillment — is the part that quietly determines whether you survive.
45. Update your P&L, balance sheet, and cash flow statement every single month — and dig in
A great product you can’t reliably ship doesn’t actually exist. The least glamorous part of ecommerce — sourcing, logistics, fulfillment — is the part that quietly determines whether you survive.
46. Build assets you own
Your email list, your brand, your reputation, your owned audience — these are the things that survive an algorithm change, a platform shift, or a bad quarter. Chase this month’s revenue, sure, but build the assets that outlast it.
47. The best source of money is, wait for it… customers
Borrowing money is often necessary to start an enterprise. But after that, do everything in your power to generate your money from customers rather than investors or lenders. Customer revenue is the only funding that comes with no strings, no interest, and no due date. Every other lesson on this list is, in some way, in service of this one.
Closing Thought
None of these are complicated. That’s kind of the point. After 20 years, the lessons that survived aren’t clever hacks — they’re simple truths I kept relearning until they finally stuck. Build a great product. Protect your cash. Own your audience. Take care of your people and yourself. Stay in the game long enough to win.
If you’re a brand owner trying to grow on Amazon and you’d rather not learn all 47 of these the expensive way, that’s exactly what we do at Mohaus. We don’t just consult — we operate. We run our own brands on the same platform we help our clients win on, which means every bit of advice we give comes from someone spending their own money on the same battlefield.
Book a free Amazon audit with Mohaus → and let’s talk about which of these lessons your business is ready to put to work.
