How to kill time on an airplane?

I admit it, I am always bored on airplanes, especially long international flights with horrible movies. Yeah, you know what I'm talking about. On shorter flights, I usually look through the sky mall magazines, and this usually wastes an hour or so. Then I usually carry around some cards and play solitare, and this lasts me the rest of the 2 hour flight. On international flights I usually have my laptop, and I can watch videos for 2 hours, but what to do with the rest of the time. I find the best solution is to sleep. If you can't sleep try to lay as still as possible and almost make a game out of it. This usually puts me to sleep and leaves me refreshed when the plane lands!