Nursing degree...?

I wont be able to start the nursing program-which has limited available spots untill fall 2008.. I am going to take all my pre-reqs this year and want to study as much as possible for when i start the prog. What should I study most? Biology? math?, anatomy (and do you need to know every specific part of anatomy for nursing?)? I just want to make sure I know as much as possible and am not waiting a year to start learning when I can learn now. .. and I have heard a lot of what hospital RN's do, what I'd like to know is what they do in clinics like a private pediatric clinic? Thank you so much!