Use all of the resources that you have for studying. Use text, notes, any CD-ROMS that come with your books, NCLEX review books (even testing myself on the sections we haven't gotten to helps me, because I have gottten used to the testing style. Also, reading all rationales helps me to retain information better.)...if there's a study guide to your text, buy that and use it. If your professor takes the time to send you any hand outs, like review questions, study them, too. Ours do this, and sometimes it seems like you spend hours looking for the answers and then none of the info is on the test. But sometimes it is! And even if you spend alot of time looking up the answers, I have found that in doing that I go over information that I never noticed before when reading, or I just read stuff in more detail. Make flash cards for words you don't know, or for memorizing lab values, procedures, etc.
The other day we had a test that AT LEAST half the class failed. I made a 94. The advice I'm giving you is the same advice I have given to everyone who has asked me.
Hope this helps. Good luck!