My colleague Simon Pithers has digged out a nice source for cheat sheets – you know those nice A4 printouts that contain the most important information on syntax, semantics or keyboard shortcuts on a particular technology, product or game. I found the CSS one to be really handy.
Talking about cheat sheets and giving the post at least a bit of a push towards being related to Adobe technology:
Flex Builder Mac cheat sheet (Josh Buhler)
…and some more Flex/AIR/Flash-related stuff on actionscriptcheatsheet.com