I just took CCRN and I used Gasparis DVD watched them and took notes. She sends you a book with all her slides so I took notes in that book. Then 95 percent of my time was focused on doing pass CCRN questions by Dennison. I honestly believe that if you practice questions you will be successful. Also just make sure you fully understand the rationales. Also review your basic critical care knowledge such as the types of shock and hemodynamics of it. DI and SIADH lab values serum and urine. Neuro review your normal ICP, how to tell if you have CSF drainage. . . Basically Gasparis review should be enough. So overall spend time reviewing do a lot of practice questions and review your rationales.