I'm bored. What shall I do?

I don’t feel sleepy. I have an exam tomorrow/
I’ve been revising my arse off the whole day and I know I won’t be able to go to sleep right now. So… what should I do?
Is there something wrong with me? It seems as if I am bored all the time. I can’t stick to doing one thing in particuar, because I just get bored of it too quickly.