Two more writing exercises to add to ye olde pile:
Three Parts (scenes). I may spin one or two of these scenes into a full-fledged story some day. You get zombies, the search for love and space drama. Variety!
Follow the Tracks. This one is unprecedented for me. I took an unfinished story that was abandoned 17 (!) years ago and finished it.
They can also be found on the Writing exercises page.