change positions alot, drink coffee, mountain dew, anything with caffeine and sugar. Take a morning jog, cold shower, excercise a bit before the lecture, bring a walkman, play little games with your neighbor, take a pad and doodle/draw away,
think up plots for a movie, computer-game, erm, write a song, compose a ballad, plan out a strategy for your favorite game, design a great role-play character
not that I've ever been bored during lectures
