What is your favourite way to pass time on the internet?

I’m in an airport hotel with very little in the surrounding area to entertain myself with. I’ll be here till tomorrow afternoon. All I have is a book (which I have to ration for my subsequent plane ride/beach trip), the TV (I don’t particularly enjoy watching TV), my laptop and an internet connection.

I’m all Fluthered out, Facebooked out, I don’t have any computer games… which websites would you recommend to help me pass some time?