Create an outline detailing your ancestry and its influence upon your parent's life situation at the time of your birth. It is necessary to understand the events leading up to your arrival in the world so that you will be better able to explain in what position you started life.
Add to the outline all the important or major events that have happened in your life up until the present day. Include significant relationships, schools, parents' marriage or divorce, children, jobs, effects from natural disasters and other events that had major impact upon your life. Keep the events listed in chronological order. Write only enough information to remind you about the event; do not go into detail in the outline. However, do write down any strong emotions you have associated with these events.
Add to the outline any strong memories which stand out in your mind that you believe had a profound effect on the person you have become or a decision you made in life. This could be a conversation, a scene in your mind, a smell or an emotion.
Choose a perspective or angle from which you plan on writing your autobiography. This could be a moral such as overcoming adversity, a historical piece or business path. Ask yourself who your audience is and what your ultimate goal is in writing this story. Ask yourself what your main point in writing this narrative is. Refer back to your outline from the previous steps, and choose which events contribute to your main point. Cross out all points on your outline which do not emphasize how your life lends itself as a tribute to your main point.
Write the introduction of your biography, explaining in brief who you are and what your purpose is in writing the autobiography. Allow this to be an abstract of the story, summarizing what is to come. Write your parent's background briefly, explaining how they met and the circumstances under which you were born. Include your family's religious background, financial situation, living situation, geographic location and previous siblings at the time of your birth.
Write the body of your autobiography, sticking to chronological order. This will make the narrative much easier for your audience to follow. Refer to your outline for subject matter ideas and memories upon which you can draw. Be specific when recalling events of the past, giving the reader lots of detail to recreate the event in their own minds. Explain your own thoughts, emotions and conclusions that you had throughout these events. Relate everything back to your main point, explaining how these events and thoughts moved you closer to the person you are today.
Conclude your autobiography by sharing our own thoughts about your future given your past actions and current position in life. Use past decisions or lessons you have learned to support your belief that your future will follow your proposed path. Finish by referring back to the moral or main point of your autobiography, leaving your readers with a take-away thought at the end.