I utilized the book and case studies HESI/Elsevier first. The HESI book really is invaluable: pay close attention to those "HESI Hints" - they definitely show up on the test. I made notecards of them. I continued reviewing the HESI book/HESI Hints, and then, I used Saunders CD of ~5000 questions to supplement. I aimed for 75-100 per day, every day.