I'm going to suggest something a little off the wall. I did this when I took the PCAT. I can't say how much of an impact it made, but I did come out with a 99 composite.
What I did was go to the PCAT in a suit. The theory is that if you look good you feel good, and the better you feel the better you will do. It's also an intimidation technique. The PCAT is a curved test, so every question someone else gets wrong is a potential point for you. If dressing up distracts other test-takers, you can actually benefit from this. In the same vein, you also want to look as calm and prepared as possible. Obviously, you want to be calm and prepared, too, but appearing like you aren't the least bit nervous about the test can make everyone else nervous.
This probably seems petty, but consider it. And most of all, don't let other people distract you. You have to block out the other test-takers, because it's not about them.
What I did was go to the PCAT in a suit. The theory is that if you look good you feel good, and the better you feel the better you will do. It's also an intimidation technique. The PCAT is a curved test, so every question someone else gets wrong is a potential point for you. If dressing up distracts other test-takers, you can actually benefit from this. In the same vein, you also want to look as calm and prepared as possible. Obviously, you want to be calm and prepared, too, but appearing like you aren't the least bit nervous about the test can make everyone else nervous.
This probably seems petty, but consider it. And most of all, don't let other people distract you. You have to block out the other test-takers, because it's not about them.