I think there's something on SAEM.org in the student section about getting the most out of your rotation. But if you're just looking for general advice, show initiative, take interest in procedures and have a general idea of how to do the common ones, but for goodness sake ONLY PICK UP WHAT YOU CAN HANDLE. It is far more important to see one or two pts at a time and see them through to completion than to have many that you're not following up their response to your treatment or their labs. And, your presentations should be complete but succinct...not an internal medicine rounds type presentation. The students, i think, who do the best are the ones that pay attention to vital signs and don't just stop at the end of the H&P but also tell me what things are in their differential (in a general order of likelihood) and what tests they want to order...