I pace a lot, especially when anxious of nervous.

Hands in pockets when I walk outside; it has taken a long time to ween myself off this, but I end up doing it sometimes, regardless; it's just a more refined version.

Bad body-posture when I'm sitting. (like right now!)

Not stretching before a workout. (I do that, now, but for years I didn't)

I have a tendency to drink too much liquid, because I feel like I need to, for some reason; it actually gives me dodgy guts. -.-

Drinking carbonated drinks. -.- Ergh, when will I learn. Not ones will loads of sugar, ... incidentally, eew... but just them in general, as they gas me up and my body can't get rid of gas as quickly as normal people, for some obscure reason, so I have to avoid or minimize those drinks.

'bout all I can think of, off-hand.