...er, yeah, on reflection, it occurred to me that being sleep deprived AND on crutches is probably not a good idea. So while I'm still definitely determined to shift to a polyphasic schedule, or try to, I'm going to postpone it until I'm actually able to walk on my own reliably. I need that ankle in good working condition, after all.
This is actually very irritating. I'd psyched myself up and everything, and now I'm putting it off. *sigh* Well, maybe I'll be able to add some more things to my "things to do" list to help me stay awake when I do it.