Due mainly to physical reasons, actually--a cold that has my nose stuffed up, the perfect room temperature so that one blanket is too cold and two are too hot, and a bladder that doesn't know when it's empty. I'm also worrying for a friend, but that just kept me from going back to sleep easily.
Anyway, I intend for today to be a day of quiet contemplation and hacking. Mostly hacking. Probably won't happen, but hey, I can dream.