I'd say I listen to music, but I
always listen to music, so... doesn't really count.
I tend to either be really quiet (more than normal; I'm not that talkative of a person around most people, though I'm not shy, even though so people think I am) or I'm very chatty and trying to cover up the fact that anything's wrong at all.
Occasionally I cry, but that's generally only when things to get to nearly breaking point - if I'm crying, it's definitely a bad sign cause I'm not really an outwardly emotional person. Though most of the time when I'm crying, I'm alone anyway, so nobody will ever know I've cried.
Sometimes I punch things (walls, doors, poles, whatever's handy really, though not people), but that's surprisingly rare, despite the fact that I have very violent thoughts.

Hm... yeah, I think that's about it. Dunno really what the 'normal' thing I do is.