The Experience
(Proving I'm not spending all of my gamethink at the Bones Forum.)
What actions earn you experience? In something where there's plenty of experience scattered about (say, AD&D) I feel free granting xp for anything noteworthy (including quotes.) In something like BESM, though, full-play of sessions seem required. In G&G, experience is gained (and spent) primarily by getting one closer to the PC's personal goal.
Besides the "contributions" model, what are some of the reasons/ways you award experience?