Self Publishing on Amazon KDP: Avoid These 10 Mistakes

okay so here’s the thing about KDP mistakes that’ll actually cost you money

I was just helping a client fix their book listing last night and honestly, these same issues keep coming up over and over. Let me walk you through what’s actually gonna tank your book before it even gets a chance.

The keyword stuffing disaster

So first off – and I see this constantly – people think cramming every possible keyword into their title is smart. It’s not. Amazon’s algorithm got way smarter around 2019 or so, and now it just looks spammy. I tested this with two identical coloring books last year. One had a clean title: “Mandala Coloring Book for Adults: 50 Stress Relief Patterns” and the other was like “Mandala Coloring Book for Adults Relaxation Stress Relief Anti-Anxiety Mindfulness Creative Art Therapy blah blah blah.” The clean one outsold it 3 to 1.

You want your seven keyword boxes to do the heavy lifting, not your title. Use those backend keywords for variations and related terms. Like if your book is about budgeting, put “personal finance” “money management” “debt free” in the backend, not all smooshed in the title.

Wrong category selection because you didn’t dig deep enough

This one drives me crazy. You get two categories upfront, but most people just pick the obvious ones. Here’s what actually works – you gotta research categories where you can realistically hit top 100. I’ve got a planner that makes about $800/month and it’s in three super specific categories. Not the main “Self-Help” category where you’re competing with Atomic Habits, but like “Self-Help > Personal Transformation > Time Management” or whatever the exact tree is.

oh and another thing – you can email KDP support and ask for up to 8 more categories. Most people don’t know this. Just be specific about which ones you want, give them your ASIN, and they’ll usually add them within 48 hours.

Your cover looks like it’s from 2012

Look, I’m not a designer. My cat could probably make better design choices than me. But here’s the reality – your thumbnail needs to work at the size of a postage stamp because that’s how people see it in search results. I spent like three hours last Tuesday comparing top sellers in the gratitude journal niche (my meeting got canceled so I went down a rabbit hole) and every single one in the top 20 had high contrast, minimal text, and bold colors.

If you’re using Canva, that’s fine, but don’t use their templates as-is. Everyone recognizes them. Customize the hell out of it or hire someone on Fiverr for $15. The investment pays for itself with like three sales.

Pricing it wrong from day one

Okay so funny story – I launched a notebook at $5.99 because I thought that was the sweet spot. Made like two sales in the first week. Changed it to $7.99 and suddenly it started moving. Sometimes higher prices signal quality, especially in low-content stuff. People assume a $3.99 journal is gonna be flimsy.

For books under 108 pages, you’re on the 35% royalty. Once you hit 108+ pages with cream paper, you can do 60% royalty but your price has to be higher. Do the math before you finalize your page count. I’ve got a spreadsheet for this but basically… you gotta figure out if adding pages to hit that 60% tier actually makes you more per sale after the printing costs.

Ignoring the “Look Inside” feature setup

Amazon automatically shows the first 10% of your book in the preview. If those first pages are just copyright info and blank pages, you’re losing sales. I always put my best content or most attractive pages right upfront now. For a coloring book, that means your prettiest designs. For a planner, show the actual functional pages, not the boring intro stuff.

You can preview exactly what Amazon will show before you publish. Most people skip this step and then wonder why their conversion rate sucks.

Not testing your interior on actual paper

This is gonna sound obvious but order a proof copy. Always. I don’t care if you’ve published 50 books before. I had one book where the margins looked perfect on my computer but when it printed, the binding ate like a quarter inch and some of my content was in the gutter. Cost me a bunch of returns and tanked my rating.

The proof copy is at cost, you’re only paying printing + shipping. It’s maybe $5-8. Just do it.

Writing a description that’s just a paragraph of text

Use HTML in your description. Bullet points, bold text, headers – these all work and make your description actually scannable. People don’t read paragraphs anymore, they skim. When I reformatted a book description from one long paragraph to having clear sections with bold benefits and bullet points, the conversion rate went up like 40%.

Structure it like: hook sentence, bullet points of what’s inside, who it’s for, another call to action. That’s it.

Forgetting about Amazon Ads from the start

You don’t need a huge budget, but running even $5/day in auto campaigns when you launch helps Amazon figure out where your book fits. The algorithm needs data. If you just publish and hope for organic traffic, you might be waiting months.

I usually run auto campaigns for the first two weeks, see what search terms Amazon finds, then create manual campaigns based on the terms that actually converted. It’s not complicated, you just gotta be willing to spend like $50-100 testing.

Your book interior has formatting issues you didn’t catch

Download your PDF and zoom in to like 200%. Check every single page. I found a random text box that said “sample text here” on page 47 of a journal once, AFTER I published. Nobody caught it in like 30 sales but eventually someone left a review about it. Super embarrassing.

Also make sure your page numbers are consistent, your margins are identical throughout, and if you’re doing a book with prompts or lines, that they’re actually usable. I’ve seen notebooks where the lines are so faint they’re basically invisible when printed.

Not researching competition before you create anything

This should maybe be #1 but whatever. If there are already 5000 gratitude journals and the #100 best seller is only moving 2 copies a day (you can estimate this with tools like Book Bolt or Publisher Rocket), that niche is probably saturated. Look for niches where the top 100 is making decent sales but the quality of books is mid.

I look for opportunities where I can do something better – better cover, better interior, better description. Not just copying what’s there.

wait I forgot to mention – check the review count on top sellers. If they have like 2000 reviews, you’re not gonna compete as a new book. Find niches where the top books have under 100 reviews. That’s your window.

Publishing without an author page or brand

Set up your Author Central account. Add a bio, link your books together, put your social media if you have it. People do click through to see what else you’ve published. If you have 10 books in similar niches, someone who buys one might buy another.

I’ve got different pen names for different niches but under each one, I keep the branding consistent. Same style covers, similar book descriptions, professional author photo (or logo). It adds credibility.

The biggest thing is just… don’t rush. I know you wanna get your book up and start making money, but an extra day of checking these things will save you from having to unpublish and redo everything later. And Amazon doesn’t love it when you unpublish books, messes with your account health.

Also your trim size matters more than you think. 8.5×11 is standard for workbooks but it’s more expensive to print. 8×10 can save you like $1 per unit in printing costs. Multiply that over 100 sales and you’re talking real money in your royalty.