And I realized that there was no real reason for feeling like that. (Except perhaps staying up til 2:30 last night reading The Last Hero.) I was thinking of lots of things to be sad about, but they weren't the real reason I was feeling so sad, they were just means through which to feel sad.
I'm feeling somewhat better now, though still not as productive as I'd hoped. But 'tis enough, 'twill do.