Handy book:
http://goo.gl/FPDr5H
Don't memorize it, but refer to it on your rotation after you see stuff.
Show up early, don't be the first to leave.
Don't scoff when someone hands you work (it happens). Your H&P/discharge summaries won't be perfect, no one is expecting them to be. Want we (residents) want to see is that you used your brain and are able to tackle work in a somewhat independent manner.
Be prepared to go through an entire physical exam while "under the gun". If you don't already, do your exam from top to bottom on every patient the same way. Full, complete, efficient. You can typically tell the ones who don't do exams on a regular basis, especially when they go straight for reflexes or a babinski...
Practice your oral presentation skills a bit. Know your structure, try to adhere to it. We're a laid-back bunch generally and there will be wiggle room.
Enjoy yourself - laugh, socialize, chime in here and there. You don't have to have a stand-up skit ready, but saying nothing and keeping your head down is nearly as impactful as being rude or disrespectful. Perhaps not in the same way, but it's not how you want to be remembered.
Note how most of these are productivity-related rather than knowledge related. You've shown you can learn what's needed by virtue of making it through medical school. Now show us that you can be a productive, hard working colleague that we won't dread checking our patients out to on a Friday night.
