Quizlet is a very cool little website that allows you to quickly create flashcards and quiz yourself on them.

You can also test yourself in other ways such as true/false, multiple choice, matching, and written answers. 
What makes it particularly useful also is that there are already over 300,000 “sets” of flashcards made for common test questions. [...]

Ever wonder how “smart” people seem to memorize everything the night before an exam?
Sure there are a few rare people who are born with a natural gift for memory (for example, the 2004 World Memory Champion Ben Pridmore memorized the order of cards in a randomly shuffled 52-card deck in 31 seconds). But for [...]