So I had an accident back in August that required surgery (type 5 AC separation), and now in cleared to bike again, I'm trying to get back into the swing but finding it's quite difficult, I assume because I had some severe depression from the whole thing and spent a good month being a hardcore couch potato.

When I first started commuting (and riding seriously at all), I just kinda of did it, pushed it until it was easy. This time, I'm wondering if anyone has advice for how to work back up more comfortably. Right now I'm riding to employee parking (university campus) and biking around to class and work, since it's my first week being cleared to ride (and because the very first day I could, I commuted the whole way and was a little run down). I expect the best thing really will be just to bite the bullet and suffer the rough week or so of grueling riding, but any advice on the topic would be very appreciated.