As a.. I dunno, break from regular stuff, the GM once did a "whose line is it anyway" style mission. Without telling us why (no idea it would be related to Shadowrun) he had us write, you know, like 5 nouns, 5 verbs, 5 settings, etc. Then we played shadowrun, and he would pull papers out of a bag and built the story that way. And this was totally in-campaign, events would stick.
It was pretty wacky but it worked. It was a while ago, I'm fuzzy on the details, but I remember ending up with a pet monkey called Furious George that ripped the throats off my enemies for a while, but I was never sure if he would turn on me. Unpredictable monkey.
EDIT: never noticed "monkey" is 1 k away from "money"