I'll admit it. I already knew what defenestration does to a person. But if I hadn't known, I would have gone to Answers.com for the answer. Simply put, Answers.com is the most amazingly useful aggregation of information collected under one link anywhere on the web.
Don't know anything about tofu? Answers.com delivers a definition, history, nutritional values, links to recipes and related topics, as well as translation of the word into 15 languages. Want to know what happened today in history? Answers.com brings birthdays, events, news, quotes all onto a single page.
The pages on answers.com are more likely to have the information I am looking for than any other reference tool on the web. Quite frankly, I'm almost afraid to share answers.com with others, because I think knowing that URL gives me a strategic advantage. It's at least a ten point boost to my IQ.
qv: Answers.com