As a former LPN student and current RN student, I have a few surviving school-tips...
I make a solid effort through school to try to take care of myself so I won't get run down and get sick all the time...healthy diet, working out, and taking vitamins...it is hard with what little time is available, but worth the effort.
As for studying, I highly recommend making 'study cards' whenever possible. Write important points to study on index cards and flip through them and read them over, and over, and over some more. I learn well by writing, and a lot of times on tests I will recall writing something out and that will help me come up with the answer. Plus...these are more portable than your books..I keep mine in my purse when I'm out and study them every chance I get, at red lights, in line at the store, waiting for something, etc...
Make one or two good, close friends in school if at all possible. Talk about your challenges to completing school with each other. They will help keep you motivated, look out for you when something comes up (i.e. car breaks down and need a ride to clinicals, missed class because I was sick & needed notes, class was cancelled for tomorrow and instructor didn't call you, etc...all stuff that has happened to me or my friends in school) and be your support person that is going through the same trying time you are. Make sure you support them as well.
One more thing...take 20 minutes right now to sit down and figure out exactly how many days of school you have left before you graduate...make yourself a tear-off booklet where you can tear off each day when it's done, or a calendar where you can X off each day...I know it sounds hokey, but it kept/keeps me motivated to see myself actually making progress towards graduation.
Take a deep breath...try to relax...and know it will all be over before you know it...really! Good luck.