Introspection is the act of examing one's own thoughts and feeings. This process of self-analyzing can include observation of the mind, soul, and personal actions.
When reading or writing diaries, journals, memoirs, and autobiographies a great amount of introspection is involved.
Diary - daily log of your routine, which includes specific details about the day's events and occurences
Journal - can be spontaneous or topic-based but contains feelings, emotions, observations and personal reflection (introspection)
Memior - (French, meaning memory) a collection of memories written in first person that tells a story from a life such a turning points or major life events.
Autobiography - a factual chronological account of a person's life, written by that person
Differences between a memoir and an autobiograph: An autobiography tells the story of a life, while a memoir tells a story from a life