Those seats get hard. Bring ear plugs. The exam room can be very noisy. I sat next to a guy who grunted every 30 seconds, and it drove me crazy. My arms almost fell off.
Calculators Bring a back-up calculator.
I couldn't believe it when the display on my calculator started losing characters during the exam. An expensive calculator isn't necessary, especially if you do not have time to learn how to use it. No programs needed. Save your money. The HP48GX rules.