Definitely have a few of my own...eat the same breakfast, waffles with maple syrup and butter, 2 eggs and 2 pieces of bacon with a cup of coffee. Never wear the same pair of socks (the test proctors always give me hell for wearing socks with crazy patterns on them and it seems like they're excited to see what I have on when I lift my pants legs). Always listen to Kid Cudi's "Soundtrack to My Life" on full blast while driving to the center, with windows down (no matter the weather).
I also have pretty much locked myself in every weekend before a test. Some people say I'm lame for doing that, but I don't study terribly much until then (mostly just focus on reading before that). 5/5 so far so it seems to work.