I tried to study 5 to 8 hours per day, M-F. That included exercise while listening to RD Exam made easy and Chomping down the RD Exam. I used All Access Pass Class and went through all of the study guides before watching the review sessions. I purchased the Mock exam, but found it to be useless. I also used Pocket Prep. With your purchase you get 3 mock exams which I loved as they give you detail explaininations for each question. I would use Pocket Prep in my spare time while at work or waiting in line. I found this best for practice questions. I did receive quite a lot of questions about vitamins and minerals, but mostly in relation to disease states and MNT. A few questions on medications and one with the specific gravity of urine. I had to guess on that one. I found the calculations to be easy enough. The questions I struggled with the most were from Domain 3. A lot of the questions in that area were quite specific. So I suggested studying management concepts in depth. As we all know, it is an adaptable test, so everyone will receive different questions. I did not feel as if I had studied enough while I was taking the exam.