Hey,
So you are about to start Med School. Let me be the first to tell you that you have made the right career choice, if you are in it for the right reason. I am 21y/o medical student...one of the youngest in my class, yea its hard, yea its stressful...but I love it. So you want info. O.K.
First semester you will be taking Histology/Embryology, Biochemistry and Gross Anatomy. If you want to get ahead, do some reading in the Gross Anatomy book (Author: Moore), get a Netter and start on the "Back", which will be the first aspect on gross that you will encounter. Gross is not hard/difficult, it just takes alot of time and memorization, but try to understand it...the insertions, innervations, blood supply and actions of each muscle. My best advice would be...ENJOY your free time now, spend it with your family or loved ones...relax and be excited for what you are about to embark upon in the future. Best of luck!!!
-Brian
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-Bri