Take your prereqs as early as possible. Maintain a >3.7 gpa...don't listen to those people who say, "come on, you're only in college once, you'll remember the crazy times we had, not the times you were studying"...these people clearly aren't premed (or won't be soon), and it's extremely possible to maintain a good gpa if you know how much time you need to prepare for exams...the fun times will come with good time management. Then again, if you find that all you're doing is work all the time, make sure you get in some fun/stress-releasing activities. Don't take classes over the summer...do something interesting/medically related like research or volunteering. I did research in England and NYC for the past three summers - best times of my life because when you're not in the lab you can party like a madman in fun cities. Get involved, get leadership positions. Shadow a few doctors, get some patient contact (You do not need 100+ hours of EMT experience or anything like that...just something you would feel confident talking about in an interview). Don't listen to anything your premed advisor says...never met with the woman and never go to any of the information sessions, they're just there to scare you. Take the mcat in August before Junior year, or April during Junior year (don't do it in August if studying for it is the only thing you'll do that summer). Get your applications in early!!!