Make sure you take a basic physiology course and a basic biochemistry course. That's all you really need to get through med school. Others you could take that would help out some would be embryology, some higher level physiology and biochemistry courses, microbiology, and immunology. That covers most of the hard-core science, but I would also recommend taking some "soft" courses includng psychology, English, Latin, ethics, ... These courses will also be quite useful for med school. Premed is also a great time to learn about some topics you are interested in, but not interested enough to do a degree in, or to devote a career to. Many people take music courses, history, art, ... It is also important to try to get a few courses each year that are GPA-boosters. I know it doesn't feel right to think of courses in this way, but it is reality. That should just about do it. goodluck