@Joe Nation,
Socks. It irritates me that socks with different amounts of wear get matched with each other. As an aside, it also bugs me a little that socks are interchangeable left and right.
I actually have a solution for this, which I have not implemented, because I'm not
frickin' insane.
The solution would be thus: Label each pair of socks with the date they were bought, and the order of the pair, and a left/right designation.
For example, if one purchased a pack of eight socks today: 20121229-A L/R, 20121229-B L/R, ...20121229-H L/R.
Sorting would not be too terribly difficult, because you just sort 'em into dates and then match 'em.