I have made every mistake on this list. Some of them I made more than once. The first book taught me the most because the errors were the biggest and the consequences were the most visible.
The good news is that every one of these mistakes is fixable, and most of them are preventable once you know what to watch for. The writers who finish strong books are not the ones who avoid mistakes altogether. They are the ones who recognize the patterns early enough to correct them. Strunk and White's The Elements of Style identified many of these same patterns decades ago, and the core advice has not changed.
Mistake 1: Not Having a Plan
Starting a book with only a vague idea and no outline is the fastest way to stall at the 20,000-word mark. The excitement of the concept carries you through the first few chapters, then the middle arrives, and you have no idea what comes next.
You do not need a detailed, chapter-by-chapter outline. But you need enough structure to know your beginning, your major turning points, and your ending. Even a one-page sketch of the story structure prevents the kind of directionless wandering that kills manuscripts.
When I wrote my first book without a plan, I produced 30,000 words of material that went nowhere. The second attempt started with a clear outline and was finished in a fraction of the time.
Mistake 2: Editing While Drafting
This is the productivity killer. You write a paragraph, reread it, adjust the wording, delete a sentence, rewrite it, then move to the next paragraph and repeat. At the end of a four-hour session, you have polished 500 words instead of drafting 3,000.
Drafting and editing are different cognitive processes. Drafting is generative. Editing is critical. Trying to do both is like driving with one foot on the gas and one on the brake.
Write the complete first draft without revising. Accept imperfect sentences. Leave placeholders for sections you are not sure about. Mark problems with [FIX LATER] and keep moving. The revision phase is where you solve those problems, and you will solve them better with the full manuscript in front of you.
Mistake 3: Writing Without Knowing Your Reader
A book written for "everyone" reaches no one. Every successful book has a specific reader in mind, and that reader shapes every decision from tone to vocabulary to depth of explanation.
Before you start writing, define your reader. Who are they? What do they already know? What gap are they trying to fill? What aspect of their behavior will they change after reading your book?
For fiction, your reader is defined by genre expectations. how to write a romance novel want emotional satisfaction. Thriller readers want relentless tension. Fantasy readers want immersive worldbuilding. Knowing your audience means understanding these expectations.
For nonfiction, your reader is defined by their problem. They picked up your book because they need something: knowledge, a framework, a solution. Write to that need.
Mistake 4: Infodumping
Infodumping is loading the reader with information they do not need yet, often in the form of backstory, worldbuilding exposition, or context that should be revealed bit by bit.
The most common infodump locations:
The opening chapter (the writer explains everything before the story starts)
After introducing a new character (two pages of biography)
When the protagonist enters a new setting (with detailed descriptions of everything they see)
The fix is simple: give the reader information when they need it, not before. A character's tragic backstory is most impactful when it is revealed at a moment of emotional relevance, not in a flashback on page three.
Mistake 5: Weak Openings
Your opening pages determine whether a reader continues. In a bookstore, the first page decides a purchase. In a query to an agent, the first paragraph decides whether they request more.
Weak openings include:
Starting with a character waking up
Starting with a description of the weather
Starting with a dream sequence
Starting with an extensive backstory before anything happens
Starting with a character looking in a mirror and describing themselves
Strong openings drop the reader into a moment of tension, conflict, or curiosity. They raise a question that the reader wants answered. They begin the story on the day something changes.
Mistake 6: Flat Characters
Characters without depth, want, flaw, or arc are characters readers forget. A protagonist who is good at everything, liked by everyone, and faces no internal conflict is not interesting.
The fix starts with character development. Give every major character a specific want, a meaningful flaw, and a reason to change by the end of the book. Test them with difficult choices that reveal who they are.
Flat characters often result from the writer knowing what happens in the plot but not understanding who the people are. Spend time with your characters before you write their scenes. Know their voices, their fears, their contradictions.
Mistake 7: Ignoring Pacing
Pacing is the rhythm of the reading experience. A book that moves too fast exhausts the reader. A book that moves at a glacial pace loses them.
Pacing problems show up in the middle of the book, where the plot sags between the exciting opening and the climactic ending. The fix is structural: make sure something changes in every chapter. Every chapter should either advance the plot, deepen a character, or raise the stakes. Your aim is for it to do at least two of those.
Short chapters and short scenes increase pace. Long chapters and extended descriptions slow it down. Alternate between the two based on the emotional needs of the moment.
Mistake 8: Telling Instead of Showing
"She was angry" tells. "She slammed the folder on the desk and walked out without closing the door" shows. The difference is between labeling an emotion and letting the reader experience it.
Showing is not always better than telling. Sometimes, telling is more efficient for transitions and minor moments. But for important scenes, showing creates engagement that telling cannot match.
A useful test: if a sentence contains an emotion word (angry, sad, happy, nervous), see if you can replace it with a specific action, detail, or line of how to write dialogue that communicates the same emotion without naming it.
Mistake 9: Not Getting Feedback
Writing in isolation produces blind spots. Every writer has patterns they cannot see: repeated phrases, structural habits, assumptions about what the reader understands.
Get feedback from at least two sources before calling a manuscript done: someone who reads in your genre and someone who can evaluate the craft. Writing groups, beta readers, and professional editors all serve this function.
The discomfort of receiving criticism is always less than the regret of publishing a book with problems that feedback would have caught.
Mistake 10: Giving Up Too Soon
Most abandoned manuscripts are abandoned in the middle. The beginning was exciting. The ending is visible in the distance. But the middle, where the structural challenges are hardest, and the novelty has worn off, is where writers quit.
The middle of a book is supposed to be difficult. Every writer experiences the point where the project feels hopeless, and the gap between the vision and the reality seems unbridgeable. The writers who finish push through that stretch. The writers who do not finish stop at that point and start something new, where the same pattern will repeat.
Set milestones. Track your progress. Tell someone your deadline. Do whatever it takes to get through the middle. The book gets better on the other side.
Every mistake on this list is one I have either made myself or watched other writers make time and again. The pattern is always the same: the mistake is invisible until someone points it out, and then it seems obvious. Knowing these patterns before you start gives you an advantage that most writers earn the hard way.
Final Thoughts
Most book-writing mistakes are easier to prevent than to fix once a manuscript is complete. Recognize these common pitfalls early, stay focused on finishing the draft, and improve through revision and feedback.
Related Resources
FAQ
Here, I will answer the most frequently asked questions about mistakes to avoid when writing a book.
What is the most damaging mistake on this list?
Editing while drafting. It kills more manuscripts than any other habit because it prevents writers from ever finishing a first draft. Everything else on the list can be fixed in revision, but you cannot revise a book that was never completed.
How do I know if my pacing is off?
Read your manuscript straight through in as few sittings as possible. Note where you start skimming, where you get bored, and where you feel lost. Those are your pacing problems. Beta readers will confirm the same spots.
Is it ever okay to start a book with backstory?
Only if the backstory contains immediate tension or conflict. A backstory opening that reads like a history lesson is a problem. A backstory opening that drops the reader into a dramatic moment can work if it connects to the present-day story.
How many drafts does a good book need?
Most published books go through three to five drafts: a first draft, a structural revision, a line edit, and one or two polish passes. Some books need more. Very few need fewer.
Should I finish a book I know is not working?
If you are past the halfway point, finish it. You will learn more from completing a flawed book than from abandoning it. The skills you build finishing a difficult project carry into every future project.
How do I get honest feedback without getting discouraged?
Choose readers who are constructive rather than cruel, and give them specific questions to answer. Ask "where did you lose interest?" rather than "what did you think?" Directed questions produce useful feedback that feels less personal than general criticism.