I don't remember a single thing from my 21st birthday, so it must have been an excellent night.

Phish > if you're into outdoors gear, check www.steepandcheap.com . They constantly have one single deal going; once it sells out (sometimes in a matter of seconds), they have another one lined up. Everything is up to 75% off, and they have a neat "Instant Alert" desktop tool that will warn you when a new deal starts. We've been able to get a bunch of mountain biking gear from there for ridiculously low prices (riding shorts are usually around $100; I've gotten some for $20)...