Norma, I did the same thing. I studied all of the ATI questions until I could answer the questions by just looking at the answers. I also used the Saunders book and did the pratice tests for each chapter as well as the comprehensive test in the back. I have two of the Saunders books if anyone would like one. Just take practice test after practice test so that you are in the "test" mode. Take a deep breath before you sit down, relax, take your time and be confident in your answers! Best of luck, keep us posted!
Nick