Maybe you should rest your mind for 7 blocks of questions.
Most people that scored well didnt even study the day before,
you are looking to study 30 mins before?
I'd say listen to some inspiring music on the ride there. My pre-game song of choice since 2003 has been Voodoo Child by Jimi Hendrix. The first line gets me pumped
"I stand up next to a mountain, and chop it down with the edge of my haaaaand"