I'd need something more 'external' than that

Hear, hear! I think part of what made Bingo so much fun was that once you took up multiple cards, the possibility of insane prompt combinations came into play, and I have to admit, shake 'n' bake fanfic prompts sometimes get me going like nothing else. There's just something about the need to be devious to get them all to work that makes me plunge ahead despite better judgment. *cough*