I gave my bike a spring clean today. Took the chain off and got all the gunk off, took the disk brakes apart and degrimed them. I've never biked to work through the winter before, and I was surprised how destructive it can be. I put off cleaning a bit longer than I should have, but it was hard to motivate myself to clean too much when every day involves biking across a muddy/snowy field and getting it all disgusting again. Besides, part of the motivation for getting a single speed was being able to abuse the drivetrain a little bit.
Anyway, the chain is clean and quiet, the brakes are adjusted and kind of quiet, and I'm wishing more than ever that there was good trail riding around here.