Usually, I start writing something. Specially lyrics, I like to write them and then translate them (Portuguese is my mother tongue). And I also like to write some stuff in Japanese, since I'm taking lessons. ^^
I used to draw too, but I don't do it as often.
slackerpaul said: take good classes so I'm not bored.
This. I only had one somewhat boring class last semester, and that was with a professor that I loved and had for another class before. I can't stress how important it is to get to know what professors teach great classes, which professors don't care if you draw in class, and most importantly, that you pick a major that really actually interests you. :)
In my computer classes I surf MAL.. But when there's no computer.. I fall half asleep while copying the lecture on the board, then when I wake up and read what I wrote.. It's like a friggin puzzle ROFL
well when i was in my AP chem class, i used to play ROMs in class ALL class, also when we had a sub we had a Mario Kart 64 tournament on my computer it was one of my greatest classes, other than that when i have no comp i sleep, sometimes do my homework, or talk to the guy sitting next to me and piss off the teacher
Usually just talk with classmates around or play some game that is played with paper and pencil. When we have computer classes, we just usually play some games that are installed on them or just surf around the net.