Just one of those small, and hopefully interesting bits of life -- when I have a number of empty CD cases or CDs without cases, and I manage to match one, I often end up matching a whole chain of them. Why? Well, typically I'll find that a caseless CD actually has its case in the rack, and there's another CD in there that doesn't belong, sometimes more than one, so almost always I end up making two matches when I make one. The computational aspects of this are amusing.
That, and I really love my shredder. I just love shredding all these old useless bits of paper.. and as a plus, the shredded bits are more compact, or at least more nicely compactable into a trash can, than the original paper. w00t!
It's funny how cleaning so often ends up being a trip down memory lane.. It's probably that we tend to value the larger things that make cleaning nontrivial -- nobody keeps a bit of lint from their 14th birthday, but they might keep a handmade card from the cute boy/girl from Math class.