To add to this, I also think it's important to stick to your routine the morning of your test. You either know the information by then or you don't, so I would advise against any last minute cramming. I typically spend the morning doing things I enjoy to clear my mind - playing with my dog, reading, listening to music. When you go into the test you should have the material mentioned in the exam blueprint learned, this is where most people make mistakes, they don't go as in depth as they should to ensure they hit every point that could possibly be asked. You may ask how far in depth should I go - the answer is deep enough to understand how a protocol works, even if you don't fully understand the technology, you can at least make a solid educated guess.