Hey, I had an idea for a story the other day... Not for right now, but if you like it maybe we could do it later on. It's like this: I start a story with a murder. I leave some clues about the identity of the killer or the next victim (or if he's a theme killer, what his theme is), and you develope the story based on those clues. Then... dunno, if you don't get the clues right, someone else dies and there's more clues. If you do get the clues right, you save the next victim's life and get a closer to catching the killer. And so on.
