This is an urgent message to all internet denizens: Visit TV-Tropes.org! The link can be found in the right-hand bar, under "links". It is, I think, a fitting candidate for the first link I post, as it is my favorite web page. Do not be fooled by the name - it doesn't only revolve around TV. It also contains material on [deep breath] video games, movies, music, literature, comics, tabletop games, web fiction, web pages, culture, urban legends, mythology, newspapers and real-life events of interest.
The basic conceit is that of a wiki devoted to gathering all those things that you've seen happen over and over in different media - and in reality - and categorizing them in an amusing and informative fashion. Have you ever seen a villain proclaim a chain of completely unpredictable events to be "all part of my plan"? Have you ever walked away from the TV during a commercial break, only to suddenly think "Hey, that didn't make sense!" about something you just accepted ten minutes ago? Have you ever come across a depiction of Nazis with implausibly advanced technology? Then you're not alone.
It's generally a good read, but be warned: If you go in there to read a single page, be prepared for sudden realizations of "Oh my god, it's been 13 hours and I'm supposed to be at work ten minutes ago!"