I've not had jaw surgery but I have broken my nose and had a rhino
1) probiotics, strong ones!
2) senna. Pain drugs slow everything down
3) something to make you sleep. I take a supplement called Z-12 but different strokes for different folks. Maybe your doc will prescribe ambien. Not being able to breathe/sleep was the worst part of recovery by far
4) mouthwash. But I plan to avoid carbs as much as possible after I have my surgery
5) saline nasal spray
6) otrivine decongestant spray. I used this after both my original nose break and the rhino...doc told me not to and at first I was good but after 3 or 4 nights of no sleep I caved. Don't think it did too much harm
7) DVDs
yellow concealer to cover any bruising