I felt like that a lot...You study and read and read and study and it doesn't seem to be enough....I could always narrow it down to two answers of course but could not figure out which one to choose...My teacher sat me down to go over one of my tests and she said to look at the question and if you had to make an instant decision and choose one thing to do which one would you choose?.........As far as studying goes...when you feel like you know the content...teach it to someone...signs and symptoms..how to diagnose it and treat it..even go through the medications and what they do. Sometimes talking it out helps you to realize what you really do and don't know....When I was doing my OR rotation I will never forget what the Nurse Manager said to the class which was "No matter what...Don't Quit"..Its easy to get discouraged but you know more that you think you do...you'll see!:)