Depends how it's going to work. We could announce the categories here, then giving people until the start of the next thread to post things if they're going for a specific category. Then we start voting when the new thread starts.
Or we could just make it a free-for-all and let people vote whenever something new comes up, but that could get hard to keep track of...
Are we going to have fanart categories as well as fanfiction?
Best Face, for instance.