Conduct basic research. Depending on your story, you may feel you need to do in-depth research on a certain subject, like air force pilots in WWII or life in a refugee camp in Poland. However, resist doing too much research before you start your first draft. You may get overwhelmed by the amount of information you come across during your research and start to forget your personal take on the facts. Remember that your memoir should focus on your memory of the event, rather than be purely factual or completely accurate.[7]
Take a step back to reflect. You're chronicling your life lessons, but what have you learned from them? Relay your intentions, desires, feelings of loss, feelings of joy, the wisdom you've gained, and other inner thoughts from time to time throughout the book. Taking a step back from the action of the story to reflect on what it all means is a good way to add depth to your autobiography.
Were you satisfied with the ending of the memoir? Why or why not? Unlike an autobiography, a memoir does not need to have a linear beginning, middle, and end. Most memoirs end without any firm conclusions or end of life moments. Instead, memoirs may end with thoughts on a running theme throughout the book, or with reflections on the pivotal event or moment in the writer’s life.
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.[1]

As is present in the biography of a person, your place and time of birth, your parents’ views, an overview of your personality, your likes and dislikes, and important events that shaped your life should always be included in your autobiography. This will give a mental picture of your life to the readers as a sort of backdrop to the main part of the story.

You may wonder how to start an autobiography introduction. The answer is simple: the same way you start other essays’ introductions. The main purpose of the introductory paragraph is to grab the reader’s attention and present the idea and theme of your writing. Don’t make the first paragraph too long: between one and three sentences are enough to compose a regular introduction. Try to provide readers with a general portrait of yourself, so they will know more about the main “hero.” Mention your age, significant personal qualities, and principles of worldview. You can also add some details about your appearance in order to make your story more vivid.

You should check your autobiographical essay for mistakes in spelling, grammar, verb tense, style, punctuation, word forms, etc. No matter how emotional or exciting your writing is, your readers will stop reading as soon as they notice the first grammatical mistake. An illiterate author cannot win the trust of the audience, so you should take this step very seriously.
Create an outline or a graphic organizer of the major topics and ideas you want to cover. For example, you might make a time-order chart -- a chart with event blocks to organize events chronologically. Or, you might draw a cluster web -- a diagram with connected circles -- to divide your autobiography into sections, such as one for relevant background information, one for life-changing events, one for special memories and one for goals and dreams. Focus on reasons why specific events, situations and circumstances were important to you and how they made you feel.