1) Ask directly and upfront (only once) what is to be expected of you. When I did adult ortho they expected without a hint of explanation that I see clinic patients pretty much solo and then go home. When I did peds ortho, certain attendings were traumatized that I saw their patients before they did. Go figure.
2) Get pimped well. For me, that meant reading a bit beforehand, even 15 seconds before presenting a patient to an attending, bouncing ideas off a resident, and saying very quickly and decisively "I don't know" when you don't have a freakin' clue. Once I realized that pimping is for a) my learning and b) their chance to show off, things get kind of fun.
3) Have fun. You're paying tuition, they're not. Learn something and crack a joke or two.
4) Always carry the specialty's cardinal tool. Ortho: Goniometer and X-ray pencil. Optho: scope. ENT: the other scope. Uro: uh....extra gloves and lube?
5) Always carry a current list of your team's patients. That sounds dumb but it just comes in handy so often when you forget what their stupid patient number is or how old they were or which room they're in.
6) If they say go home, get the heck out of there. If they want you to dawdle and get their ass kissed, they'd bend over for you.
7) Pick the residents' and attendings' brains. Reverse pimping is kind of fun too, and it's a good way to learn. Just don't space out as they start to speak (A habit I'm still trying to break)