Something I sent along to an incoming student, thought others might benefit. Some tips from my perspective/experience to succeed in the program...
1) PRE-READ. This is pretty critical. All the classes will hand out a very comprehensive, textbook-like syllabus that will detail all that you will learn in the lectures. Read the corresponding section before the lecture, and make an attempt to understand a good portion of it.
2) POST-READ. This may be obvious, but make sure to read the syllabus after the lecture, ideally after a couple of days have passed, along with the class notes to integrate everything into your memory.
3) DON'T SLACK. The classes are very manageable as long as you stay on top of things. Once you let even a couple of lectures pile up, you might put yourself in a hole you can never come back out of. I've seen this first-hand. It's not a good place to be.
4) BE EFFICIENT. Don't become one of those people who brag about spending 8 hours a day in the library. Without exception, these are the same people who are checking facebook on their laptops while supposedly studying. Focus and do the task at hand. I don't know about you, but I'd rather intensely study for two hours, and take the balance of the time for myself, than spread out the work over six hours. On that note..
5) RELAX. Make sure to take some time for yourself so that you don't go completely crazy. No one can study 24/7, and a well-used period of fun will actually improve your performance greatly. It will also help if you come with a good regular schedule for yourself with this time built in.
6) ASK QUESTIONS. Don't be afraid of asking questions in lecture or after lecture. I would actually recommend approaching the professors often, they will remember you. That being said, ask real, genuine questions, don't be that person who asks questions that are either completely off topic or questions for which s/he already knows the answer.
7) TALK TO PROFESSORS. Continuing in the vein of the previous note, talk to professors as much as humanly possible. They've been through their share of rodeos, and have lots of great advice in terms of study techniques, med apps, etc. If for nothing else, they also usually tell some great stories about ye olde days. You also never know which of them might be very influential on the AdCom or whom their friends may be.
8) BE PROFESSIONAL. This program is for people intending to become professionals. As such, you should embody professionalism the moment you step onto the campus. Some people take this idea very seriously and dress nicely for every class, but it doesn't need to go that far (although I would advise against dressing too sloppily). It can simply be the matter of being punctual to both classes and meetings, being respectful of everyone (incl. the support staff on campus), and being honest with your professors and peers. It's almost a bit sad, but this professional behavior will set you apart.
9) HAVE FUN. The year you're in classes does not have to be at all a painful process, and it all depends on your own attitude. The stuff you'll be learning is voluminous and challenging, but it's also interesting! You are being given the privilege to learn some really intricate and quite cutting edge details of how humans work. Take interest in that, and then suddenly it's not so bad reading about physiology, because it's actually kind of cool. And remember, if you're doing this the right way, you should still have some time most weeks to kick back and enjoy yourself.
