I studied almost 4 weeks. Went over AACN (ACNPC-AG) online review course few times (you get this free when you register with them), took Barkley review course Live. Many say that his CD's are same as his review course. I also studied from CCRN book and did many CCRN questions. All of this helped in some way. Go over each topic in their blue print , google it, use Medscape or pathophysiology book. Just have general idea not in much depth. Know the diagnostic tests. Hope this helps! Good luck!! There were no synergy questions just general ethical questions and couple research questions.