Weave in themes. Use the major themes of your life as a way to tie stories together, connecting your past and your present. Aside from the central conflict, what themes have followed you throughout your life? A fondness for certain holidays, your fascination with a certain place that you visited over and over, a certain type of guy you've always fallen for, a rich spiritual life you fall back on again and again. Bring up the themes every so often to help form a cohesive picture of your life.
It may help to identify the reading level of the ideal reader of your book. You can determine the reading level based on the grade level of your ideal reader. If you account for ESL readers, you should aim for a grade 6 or 7 reading level. If you are writing for a higher education audience, you may write at a grade 8 or 9 level. You can use the Hemingway app to determine the reading level of your draft, or other online reading level tools.
Writing an autobiography for a high school or a college English class can help you gain a deeper sense of personal identity. An autobiography allows you to tell your story in a way that reveals truths about your values, goals and dreams. Though there's no exact science to writing an autobiography, you should include information about your background, major events that shaped who you are and any core themes in your life. Include specific examples to help readers understand your life history.