It's really hard to pre-prepare, if that makes sense, for nursing school. Especially since every program is different. But if there is any advice I could give you it would be this:
Become VERY familiar with dimensional analysis to solve dosage calculations and practice practice practice.
Review A & P, the body systems especially.
You might also want to memorize the common lab values. There is not much memorizing in nursing school compared to other programs, but lab values are a must to memorize. Not all lab values but the common ones.
Don't procrastinate on your immunization and/or titer requirements because Fall 2014 will be here before you know it!
Congratulations to you! And best of luck!