C) Use the extra time to obsess more about doing your best work and meeting all the expectations you attribute to others but that are really your own.
To be honest, I'm not obsessing about doing my own best work so much as I'm obsessing about writing something really good, which at the moment would seem to demand that I write something better than my own work, because what I thought sounded pretty good at 8:15 this morning now sounds like I took a quick (and happy) trip to an easy finish, with much quoting and paraphrasing of material I'd already paraphrased elsewhere.
An hour later . . .
Fixed it. Made the whole thing much more complicated. Another C) option. More and better blogging when this project is finished, which it has to be by Friday!