In school I can remember writing multiple memoirs. These memoirs helped me to think, and reflect on events that had happened in my life. This encouraged me to learn more about myself, and to personalize my own journey.
100 Prompts for Writing About Yourself.Writing about yourself can help develop a better understanding of how to better write personal narration from your characters and can help you discover more realistic/relatable ways of writing.
This process is known as memoir writing or legacy writing. You are putting down in as close to the primary source (yourself or the living relative) as possible those small or large events that helped shape your existence.