To create backstory Will Dunne suggests what I consider a form of journaling. This can done one day, then the next day, and comparing your answer after you compose it one month or a week later. I eavesdrop on people to answer these questions. I think I got an intriguing situation from answering these questions yesterday besides a recorded gesture of a character. This I frequently journal on my kindle though I may resort to journaling on paper.
What is your character doing now? Where is your character doing this? Who else if anyone is here and what are they doing? When is your character doing this? What is your character thinking about now? What is the next thing your character says?