One of my english professors in high school once explained to us how we could live off of $200 a year if we wanted too (or maybe he didn't have any faith in us ;) ). Anyway, it involved sewing your own clothes, house-sitting and buying groceries on clearance right before they hit their sell-by date.
So how cheaply do you think you could live in a year and still live decently (i.e. not homeless and eating dog-food)? Be creative, how would you do it?