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.
Not necessarily a writer, but still want to record your story somehow? Don’t think that there’s no hope for you. Consider making audio or video recordings. Audio recordings can be especially helpful. You can take audio recordings to a writer/transcriptionist who can then type out your story in a logical order. Working closely with a writer as you verbally record your stories can be an alternative when you feel you are too close to the story.
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.