What are some things to do on a 12hr+ airplane ride to keep oneself from going completely INSANE?!?

I'm 13 and I'm moving overseas, to England. The airplane trip is over 12 hours and I don't know what to do with my time. I'm planning on bringing my laptop, iPod, and coloring books. xD What are some other things to do (other than sleeping...) so I don't bore myself to death?