Sorting socks. There's a mathematical solution to this. Mr. Kottke reports the findings of his own personal study. Here it is:
1) Throw all your socks out.

2) Go to Uniqlo and buy 15 identical pairs of black socks.

3) When you want to wear socks, pick any two out of the drawer.

4) When you notice your socks are wearing out, goto step 1.

QED
[Kottke via Twitter image via]