Congrats, man! Sharky is definitely right about the bendy straws. Those were really helpful during the first week. And in no particular order:
A neck pillow, recliner, or several pillows stacked on top of each other can make sleeping easier.
Constipation was definitely an issue for me. I took an over-the-counter stool softener. I probably needed a laxative as well, but I didn't take one. Ginger ale or bland toast can help with nausea (a possible side-effect from the anesthesia or antibiotics). Also, with the antibiotic, it's recommended that it be taken with food to prevent nausea. I ate sugarless jello (about 10 calories) each time I had to take one. Besides the horrible taste that I can still recall, I never got sick from it.
Button-down shirts, scrub bottoms (or any pants/shorts that are easy to put on), and slip-on shoes are great to have for the first few weeks. Bring socks to the surgery center/hospital (it's usually really cold there).
Books, dvds, tv, laptop, hand-held games all help with the boredom while you're actually awake.
It will probably be a week before you can shower again. I used a regular wash cloth with soap and had my mom rinse my hair in the sink. But I know other guys have used baby wipes and no-rinse shampoo. My surgeon (Garramone) recommended that I shave my armpits prior to surgery. That way the tape wouldn't catch and be utterly painful to remove. Glad I did it too, even though it was incredibly difficult (haven't had to shave there in years).
I'm sure there's other stuff, but I was pretty much out of it the first week. Mostly just slept, ate, and watched tv in the hotel room. Once again, congrats. Let us know how everything goes.