I actually think its a valid topic. I wish i hadnt drank anything after 3pm the prior day. Right after the test started, so did my bladder. Beleive it or not, i got up and went to the bathroom twice during the test, i just couldnt take it. Both times after finishing a section early, but i could have used the time to go over questions.
Perfect, personally, I will go the other way with the breakfast. I think avoid eating more than you usually eat. I certainly wouldnt want to walk into a championship game with a full stomache. Also, the snickers at halftime helps to give a sugar bump, you'll burn out in the 4th quarter without it. 😉
Oh, and cotton socks rock! The hairstyle isnt important, but if your a guy its appropriate to grow a little beard to give that "I am a hardcore student who doesnt care to shave" effect and stay away from the farting, your test neighbor will appreciate it.