Major in whatever makes you happy or what you are interested in, it doesnt have to be biology or any science for that matter as long as you take the pre reqs (Gen Chem, Bio, Physics, Orgo... etc). I would definitely consider studying abroad, there is a wealth of knowledge outside of your university's walls, it is up to you to find what works for you. Also, go out. You cannot succeed if you dont get your mind off of that 5/10 you got on the bio quiz. Go out with your friends at school, and maintain a balance between partying and school. Dont listen to what all the other people in your classes say because chances are they are just as confused about the whole process as you are.
Lastly, wrap it up.
-PF