Most of what I would've suggested is listed above (including ENJOYING your freedom!)....dosage is HUGE, assessment skills, vitals...get your book and start reviewing chapters early...if you could get a copy of 1st semester syllabus, that'd be helpful...we studied about everything in this silly book (Potter & Perry), so anything you could read ahead would save you a small amount of time....and then there's lab skills....maybe review some of the links to be found on this site...here's one that Daytonite had posted some time ago from another college...they're a bit lengthy, but might be helpful to see some of what you'll be expected to do for checkouts:
Index of /DCG/videos/faculty/Dutra/N110A/
Try to prep family and friends that there will just be times when you'll be waist-deep in reading, studying, and doing things for school and that you'll catch up with them at break and to please be understanding...and then try to find time during school to give yourself a break and have lunch or a movie date with these folks....you're going to need that, too!
I didn't come from any kind of healthcare background and have managed to hold my own so far; you'll be fine!! Good luck!