This is the advice that I got in one of my test prep books. Competely forget about it for 24 hrs prior to the test (Too late for that) Get plenty of rest the night before, and have a good breakfast, you know, carbs for energy (takes energy for your brain to work) protein for brain power.
Oh, and from I got out of my test, drill into your head the line between where you would apply a BVM and where you wouldn't. I seemed to have a lot of respiration questions bases on the borderline between needing it and not.
Look at your letters from the NREMT stating what areas you fell down on and drill those. Walk in, take a deep breath and do your best.
The simple believeth every word: but the prudent man looketh well to his going. ~Proverbs 14:15