Most people stuck on the Common App essay are not stuck on writing. They are stuck on the belief that they need a better life first.

Common App reports that the most-used option in the last cycle was the topic-of-your-choice prompt. That tells you something about how the prompts function: they are wide enough that almost any subject fits one of them, so choosing the prompt is not really the decision. Choosing the subject is.

On length, 650 words is the limit colleges publish, but read the counter in the form rather than trusting a number from anywhere else, including here.

The prompt is a container, not an assignment

A common order of operations is to read the seven prompts, pick the one that sounds most impressive, then hunt for a memory that fits it. That produces essays about resilience by people who are reaching for an example.

Reverse it. Decide what you want a reader to know about you, write about the thing that shows it, then find which prompt it belongs under. There is nearly always one, and the topic-of-your-choice option exists for the times there is not.

Colleges run their own reading processes and none of them publishes a rubric, so nobody can tell you prompt choice is never noticed. What can be said is that the prompts are broad enough that most subjects fit several, so the choice rarely carries information about you that the essay does not carry better.

Small subjects usually beat large ones

The instinct is that a bigger event makes a better essay. In practice the opposite tends to hold, for a structural reason rather than a stylistic one.

A dramatic event does its own emotional work, which leaves the writer narrating. Six hundred and fifty words is not enough room to establish a serious event, resolve it, and still show how you think. The essay ends up being about the event.

A small subject cannot coast. If you are writing about repairing a bike, restocking a shelf, or an argument with your sister about a recipe, every sentence has to earn attention through observation and judgment, which are the things a reader is actually trying to see.

The test to apply: could anyone who lived through the same event have written this essay? If yes, the subject is doing the work and you are not in it yet.

The line on too personal is control, not subject matter

There is no banned list of topics. Grief, illness, family conflict, money, identity, and mental health all appear in essays that work. What separates them from the ones that do not is usually not the subject.

Two questions are more useful than a list.

Are you writing from a resolved place or an open one? An experience you can look back at and say something about reads as insight. One you are still inside tends to read as raw material, because you cannot yet tell the reader what it means. That is about timing, not permission.

Does the reader end up knowing you, or knowing the event? An essay about a parent's illness that is mostly about the parent leaves the reader knowing about your parent. It is your application.

The practical constraint people miss: this is read by strangers, several of them, and it goes in a file. Write nothing you would be uncomfortable having a committee of adults discuss. That is not a reason to be inauthentic. It is a reason to choose which honest thing you tell them.

Other people in your essay did not agree to be in it

Your essay will contain other people, most often family. They are characters in a document you are submitting about yourself.

Two habits are worth keeping. Do not disclose someone else's diagnosis, immigration status, addiction, or private history in more detail than your own story requires. And where a relative is the antagonist, be sure the essay is about what you did or understood, rather than a case against them.

Readers notice the difference, and the second version tells them more about your judgment than you intended.

Feedback improves an essay until it starts averaging it

Getting a reader is good. Getting six is how an essay turns into nobody's.

Each reader suggests a change that sounds sensible in isolation. Applied together, they sand off the specific word choices and odd details that made it yours, and what is left is competent and anonymous. Admissions readers see a great many competent and anonymous essays.

A workable rule: two readers who know you, one who does not. Ask the first two whether it sounds like you, which is the only question they can answer better than you can. Ask the third whether it is clear, which is the only question a stranger is well placed to answer. Take line edits from anyone. Take structural rewrites from nobody.

If a suggested change makes the essay better and less like you, it is not better.

What to do this week if you have no idea

Write down five moments where you changed your mind about something. Not achievements, changes of mind. Then for each, write two sentences on what you thought before and what you thought after.

The one where the two sentences are hardest to write is usually the essay, because difficulty there means the thinking is real rather than remembered.

Then draft badly and quickly, in one sitting, without stopping to fix sentences. A bad complete draft can be revised into a good essay. Three polished paragraphs cannot, and most people spend September on three polished paragraphs.