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.
Build tension and suspense. Structure the narrative so that you have a series of stories leading up to the climax of the conflict. If your central conflict is trying to reach the goal of competing in the Olympics for skiing, lead up to it with stories of small successes and plenty of failures. You want your readers to ask, will she make it? Can he do it? What's going to happen next?
Conclude the autobiography with an experience gained, a lesson learned and a resolution you decided to take after that. Explain to the reader how that resolution set the tone for whatever you achieved in your life from that point forward. This classic format uses the “hero” theme that is endearing to most people. Everyone loves an underdog who was given lemons and ended up making lemonade!
Use chapter divisions to give the book structure. Chapters are useful because they allow you to move on from discussing certain life periods or events. There's a reason we have the expression that we've "closed a chapter" or "opened a new chapter" in life, and it's even more applicable when discussing an autobiography. Chapter breaks allow you to skip forward 10 years, go back in time, or start describing a new theme without jarring the reader too much.
What were the narrator’s desires in the memoir? What was motivating the narrator to share this particular story with the reader? Often, memoirs can be cathartic for the writer. Perhaps the writer was trying to process a year of grieving and loss, as Didion does in The Year of Magical Thinking, or perhaps the writer was trying to describe a childhood in a concentration camp, as Spiegelman does in his memoir Maus. Consider the motivations of the writer for putting down their story and presenting it to readers.
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.
Use simple words and phrases: Think from reader’s point of view. Do not imagine that everybody will know what you know. Readers will be fed up if the story narration demands scrambling for a dictionary each time they come across a big word or surfing the net for new topics that you haven’t described at least in brief. Use only simple words and phrases that everyone can understand, and when introducing a new concept or subject, explain it so they know what you’re talking about.
Pull out the best stories. The story of your entire life would start to get pretty long-winded, so you'll have to make some decisions about what anecdotes you're going to include. Begin drafting your manuscript by writing out the main stories that will be woven together to create a picture of your life. There are a few main topics that most autobiographies cover since readers find them fascinating.