Like Braveheart, I've got a high bed that made it difficult to do the hospital-bed roll. I don't really remember how I negotiated it, but figured something out so I could sleep in my own space. But other than going braless (blessed relief), I pretty much wore the same stuff I always wear (which tends to be loose and comfy), and slept with a sausage-shaped pillow under the right side of my chest. I couldn't sleep on my left side until about two months out, but at three months almost everything's back to normal, I'm exercising, working, and really enjoying life. This is the new lease we're given--so take it easy while you need to, but don't be afraid to get up and go when you're ready.
One bit of advice I would pass on, though, is to wean yourself from high-powered pain meds as soon as you can. Even though I was uncomfortable, knowing what hurt and where was actually helpful. It made me restrict movements when necessary, but also let me know when I was ready for each new step. By the time I saw my surgeon at about 3 weeks, I was off the narcs and only needed a little help from an occasional ibuprofen after that. Even though we want to be comfortable whilst recovering, it really does help to know where it hurts.