On the day of the exam, wear a watch; the exam room may not have a clock. I was well prepared for the exam, but I started out slow on all three parts and had to pick up the pace at the end of each part in order to answer every question. I might not have been able to finish if I had not been able to monitor the time myself.
Bring a flashlight with you for the inpsection portions of Part B. Lighting in the room where I took the exam was poor. AWS gave us each a keychain flashlight as a souvenir of the test, and that flashlight worked OK, but you will feel more confident going in if you have your own light.
If noise bothers you, get over that right now. Elevator music played in the room where I took the exam through the whole day. No one knew how to turn it off. Sit in the middle of the room, away from the proctor's table. Some people are rude and inconsiderate, or maybe they just don't think, and they will carry on loud conversations with the proctor after turning in their exams - that's not the kind of distarction you will need in the closing minutes of the exam.