When I was prepping to take the board exam, I focused on really mastering the concepts rather than just trying to memorize the answers. I made sure I had a solid grasp of why certain things go wrong clinically and then I mapped that back to the type of exam questions I was likely to get asked. That really took a lot of pressure off. What really helped me was using this thing called spaced repetition to drill those concepts home, but in small chunks short daily sessions rather than trying to cram all the studying in at once. I also made sure to keep an eye on my weak points on a weekly basis, that way I could get a better idea of how I was doing rather than just guessing. One thing I learned that really paid off was simulating the actual exam conditions pretty early on, and then doing it regularly that way I got used to the format and didn't feel so stressed out by it on the actual exam day - which of course meant my knowledge was able to shine through.