I came across this blog post which discusses first drafts of a novel, and whether they're worth keeping or should be thrown out altogether.
I especially liked this part -- how clever!
9) List all of the events in your book backwards, with "because" in between them. This is also a great revision technique. "The hero won BECAUSE she had the golden apple BECAUSE she spared a witch who gave it to her BECAUSE the hero felt sorry for the evil witch BECAUSE she herself had done some bad things BECAUSE she was misled into thinking a hero needs to be ruthless BECAUSE she was young and determined to prove herself." And so on. Do those "becauses" actually make any sense, when you run it like that? Do you care about that chain of cause and effect, as a basic skeleton? If any of those BECAUSE statements are like "because I, as the author, said so," can you fix that without the whole thing collapsing?