This should kill more than a few hours, be you a writer, reader, television obsessive or movie buff, rabid fan, or some combination thereof – the TV Tropes wiki is a user-contributed archive of tropes and plot ideas from literature, film and television, computer games … pretty much any form of entertainment media you can think of. Plus lots of amusing commentary on the nature of fandom, and the wiki’s community itself. Funny, informative and lo-fi – a winning combination, in my book. Discovered via Dinosaur Comics, which is a source of great jollity in its own right if you’ve got the right sense of humour.