Forgot about the GRE Subject Tests. All I could remember was that the correlation between Subject scores and graduate school performance was low low low. But that doesn't mean that most respectable universities don't require those scores… and now it's too late to sign up for a test before the early December application deadlines.
However unwittingly, I seem to have made a decision about next year. Procrastination finally bites me in the ass.
I'll keep looking.
Dintenfass said that it shouldn't hurt me to take a year off after college, so that's probably the best option if this eleventh-hour application nonsense doesn't fly. Looks like it's copy-editing or Rotary.