The first two weeks you won't want to work out. And ease back into it doign only things that don't hurt your torso area. Cardio is ok but mostly u have to watch the trunk twisting stuff & the whole don't lift your hands above your shoulders thing for a while. You just won't want to anyway.
Diet-wise - the first 2-3 days you just really don't want to eat anyway. Go w/ simple stuff that won't upset your stomach. Drink lots of water, etc. I'm sure they will give you pain killers & muscle relaxers the first few days - I was off the vicadins by day 4 & stuck w/ Tylenol. Then a week later I went thru a little mini-depression of sorts as the vics detoxed out. You are also water retentive for a little while after the edema & the anesthesia clear out. Its mostly just sort of annoying.
So just plan accordingly - its a recovery process that will seem like nothing & well worth it in 6 months. Even 3 months. Shit after 4 weeks I was out all weekend dancing & partying like an idiot w/ no bra & showing everyone