I'm trying to setup a taxonomy system (folders/labels/whatever) for my email and realized that my setup may not be the most efficient. So I pose this question to the collective: how do YOU organize your email?

My current categories:
Family
Friends
Business
Humor
Registration
Photos
Contact Info
Networking Sites

I, personally, have given up on organizing my e-mail (at home). My work e-mail is fairly organized, but I'm starting to give up there too. I almost want to make a folder called "Stupid crap I have to keep because I work for the government," but that's kind of a long folder name. Or "Ass-covering e-mails." There's really no reason to keep any of them, but I am not allowed to delete them, so they just get in the way. Oy.