hey jd star,
i understand the nervous feelings you're having right now. i know i felt the same way last year! the best thing i can tell you is to show how interested you are, think of questions you have beforehand and don't be afraid to admit that you don't know everything! if they ask you a question you don't understand or have a hard time answering, ask for clarification or just tell them you aren't sure. think about this: how frightening is a doc that can't admit they are wrong or are unsure?! it's part of the learning process. admitting that you don't know everything is the first step in learning all the crazy stuff you'll be learning over the next few years! also, let them in on some personal stuff about you. what makes you stand out? are you a skydiver or collect something interesting? make them remember you above all else! have fun and best of luck!