Beejaycee,
I highly recommend the text, Med- Surg Success test book, a Comprehensive NCLEX book, The Nursing Diagnosis Handbook, and the Careplan book by Ulrich & Canale, and the Mosby's pocket dictionary (optional). The Med-Surg clinical companion is helpful too because it gives you a a condensed version of most of the disease processes, but some people didn't use this.
If you need to save money, you can skip the IV Medications book - we only used it during the IV lecture for a few questions. You can do without The Lab Diagnostic book also because the back of the text has all the lab info that you will need to complete your careplans. I'm sure that you will learn more from the Lab Diagnostics book, but you don't need it to complete your work.
I used the Med-Surg study guide that goes with the text for a few sections, but you can make copies from the library. It's kind of time consuming so I would just copy sections that you want.
I answered you on the "I passed NAC1" thread for study tips, etc. Hopefully it will help you and others get an idea of how to prepare for tests.
Well I have to get back to studying for my exam.