A year and a half ago I wrote a short novel that was about 36,000 words (that doesn't fit everyone's defined word count for a novel, but I think of it as one). Today I sort of surprised myself by beginning an outline to shorten it to an 18,000-word novella. I don't think I'll get to actually write it for awhile, since I have another writing project with a friend coming up soon. But the outline will be there and it shouldn't be too difficult to bash out.