Websites of Knowledge?
AvantLegion asks: "Every now and then, I stumble upon a website that is just a veritable tome of knowledge - be it of a certain theme (like Snopes.com) or more general information (Everything2.com). Free documentation databases are invaluable, but rarely seem to come up very early in Google searches. What websites out there do you consider to be indispensable sources of knowledge? (save the obvious Slashdot jokes). Where do you look up information besides combing through search engine results?"
Seconded -- IMDB is a must, especially when you're, say, watching Independence Day and wonder, "Hey, isn't that Lieutenant Getraer from CHiPs?"
IMDB wouldn't really help, because at that point I'd be paralyzed with the shame of my intimate knowledge of CHiPs and thus unable to get to the computer.