Hone your studying skills. In many cases, medical students are given more material to study than there are hours in the day. This means that you not only need to learn how to maximize your time but also how to study properly. Get used to juggling classes, breaking up your day into study blocks and making condensed notes from your reading.
Change your habits. You might be used to hanging out with friends, catching a weeknight movie and sleeping a full eight hours. In medical school, however, you probably won't be able to do any of these things, let alone all of them. Start cutting your number of sleep hours down a little to get your body adjusted early. Also, learn to relax in shorter amounts of time by doing things, such as exercise, that also reduce stress.
Get over the gore. Whether you like it or not, you will have to face some blood and guts during medical school. If you have any kind of aversion to gore whatsoever you should prepare yourself by watching filmed surgeries, doing some animal dissections and even volunteering at a hospital or blood bank. These things will help you get used to the sight of blood and guts.
Prepare your finances. Medical school fees and tuition are not only extremely costly but the full-time education also prohibits getting a job. Start looking around early for scholarships and low-interest loans. Saving as much money as possible before school is a good way to avoid some of the expensive loans that most medical students have to take.