As a writing exercise, I sometimes go to a cafe and just pick someone, maybe the waiter/waitress, maybe another customer who looks interesting, and write an imagined story about their life, often in the first person (more personal that way). It's a fun exercise to do, stretches your imagination and is great practice for character summaries and understanding all the little bits which can make up a character you create for your own (fiction) writing. I once did this exercise on a plane from London to Venice, with an air stewardess as my subject. Made up a whole backstory about her, totally from my imagination. Was great fun doing it - the blank page is your oyster (in six!) One of these days, I'll put a collection of these Imagined Lives together....in the case of the air stewardess, the sky's the limit!