Leg-bobbing (drives people nuts), wigging my feet, chewing gum or biting on stuff (pens, hard plastic objects, etc...), jumping around, pacing, talking to myself, humming or singing to myself, playing with stress balls or tennis balls (either fiddling with them in my hands or tossing them in the air and catching them), picking up and fiddling with objects, picking at fingernails, reciting entire scenes from movies or video clips (in character, no less!), swaying back and forth while standing, rocking, biting my lip, twirling my hair (especially when tired), feel my teeth with my tongue...I think that covers most of the big ones for me.