A list of things I love because they are useful. Normally, you can't check things out of the reference section, but you can here!
--TV Tropes: An exhaustive list of every possible plot point/characterization since perhaps the dawn of time. (See: Older than Dirt.) If you can think of it, it's here. (Though it says "TV," you can find anything and everything related to stories in any form.)
--An aggregated list of fairy tales/folklore. It relies partially on the Aarne-Thompson classification system, which the anthro geek in me totally loves.