The first is something I've been seeing while watching World Series of Poker on youtube links. I keep watching the pro's do that one-hand chip-shuffle, where they separate a stack of chips and then perfectly shuffle them together without even looking, with one hand. I went "ooo neat", grabbed my poker chips, and started trying it while watching the poker game. After a couple hours I had it mastered to a 10-chip shuffle. Very neat trick, looks way harder than it is, but it does take a trillion practice attempts.

I thought I would make a youtube how-to video on it, but naturally, someone already has:
http://www.youtube.com/watch?v=0QH0IA8AD6M
The second is folding shirts. I just remembered seeing something posted from a couple months ago that showed this trick, and last night while getting clothes out of the dryer, I thought I'd try it on memory. After a few attempts I got it almost perfect, so it's going to be my shirt-folding style from now on, because it just looks slick.

http://www.youtube.com/watch?v=cQzelsebUc0
So there you are. Dumb, unpractical, useless crap to try in your spare time. Because we all have our vices.

More later.