I thought of a cool idea while listening to This American Life on Friday. Imagine you could talk to a future version of yourself, 10 years older than you are now. What would you ask them? Record (audio or video) a set of questions for them, put them in a time capsule and in 10 years time record the answers. Splice the questions and answers together to make a interview across time instead of between two individuals. Of course, follow-up questions could be tricky.