I did my first workout since the marathon on Tuesday, followed by my first race since the marathon on Friday. Both were pleasant surprises, in that I'm in better shape than I thought.
Which doesn't mean I'm in good shape right now, but that's not the point. I feel rebooted from my few weeks of "do what the heck I want" and that's good.
I'm about a month out from my half marathon on January 24th, and I've only got two runs longer than 12 miles scheduled before that race. I'm guessing that this is because I've still got a ton of strength left from the fall cycle, so there's no need to work on that right now.