The Diary Of Anne Frank. The more modern editions have some of the stuff that her father editted out about her sexuality etc. She never did make a fresh start but none the less I think that it's a wonderful book and everyone should read it.
Maya Angelou's autobiography, I Know Why the Caged Bird Sings
Angela's Ashes Frank McCourt
Girl, Interrupted - They made it into a movie, can't remember the author.
Helen Keller's autobiography - The Story of My Life.