Do you have any?
Mine is that I bring drinks to my room and pile them up.., and I usally don't take them down until I've like 4
Another bad habit is that I sleep late.. but I think we all do that
I eat my nails sometimes... (not often though).
I sleep in class.. but its because we never do anything in that class and I get bored.
Erm.., I can't think of anything else atm.
So..., what are yours?