Create a narrative.
An autobiography is just like any other work of fiction or nonfiction. If there’s no plot, readers aren’t going to be interested for very long. As you start thinking about and outlining your autobiography, keep in mind the narrative arc. You don’t necessarily have to abide by the exact structure outlined below, but most narratives contain at least some of these key components:
Exposition: Generally the beginning of your story, where you set the scene and introduce the characters.
Rising action: A key trigger (inciting incident) sets off a course of events and consequences that lead inexorably towards the climax.
Climax: The conclusion of the rising action and a key experience or moment of realization for the protagonist.
Falling action: The bridge between the climax and the resolution, and an opportunity to wrap up any loose narrative ends.
Resolution: Any remaining questions or loose ends are resolved at the end of the book.
Be yourself.
Write as though you are opening up to someone you’ve known your entire life. Your personality and manner of expressing yourself should shine through your writing. Readers will be much more engaged if they perceive you are being authentic.
Don’t write as you would for a college essay or report. In other words, cut back on vocabulary you wouldn’t normally use or overly formal syntax.
Stilted: I yearn for the halcyon days when my innocence was absolute; when the somber truth had yet to encroach upon my carefree childhood.
Authentic: I miss those days—running through sprinklers with my friends, sleeping untroubled all throughout the warm nights. I often wish I could return to my childhood, before I learned the awful truth.
Be genuine.
Autobiographies give you a chance to tell your life story, but no life is perfect! Present yourself as a whole and complex person, sharing both your triumphs and mistakes. Your readers will appreciate the honesty and will root for you.
Don't include fabricated conversations with real people, or altered versions of events that really happened. While you probably won’t remember everything with perfect accuracy, it’s important to not misrepresent any occurence or person in your autobiography.