Piggybacking on what Steve O said, I would also like to add...
MAKE SURE YOU ARE ENJOYING YOURSELF IF SCHOOL!!
I cannot stress this enough. Sure, college is hard, and apathetic students and dimwit, student-hating instructors can make life hell, but make sure you want to follow down that path. Yes, its stressful, but if you don't have any fun in what you are learning, or if the path to academia is not giving you any sense of fulfillment, then you should consider another way.
Also, I have to disagree with Steve - Avoid
BAD television. I agree with Edward R. Murrow's famous quote about TV; "This instrument can teach." Sure, the U.S. airwaves are inundated with crap, but there are some redeeming shows. Just don't let it run your life.
Also, I would suggest at LEAST one course in philosophy, preferrably Logic. I would also recommend Ernst Mayr's
The Growth of Biological Thought as required reading.
Oh, and Dr. O'Shea hit the nail right on the head: JOURNALS! Read articles in established journals and learn to write them as well.
Oh, and as far as the 'hot' girl is concerned... Go for it. You only live once. I would say enjoy being 14 as long as you're there.
Sushi and Sake (for everyone except you, since you're under-age
)
John