Study for tests, DO YOUR HOMEWORK, extra help/extra credit, raise your hand a lot in all of your classes, try your hardest. And at times, you may have to put off social activities for schoolwork, an A student puts homework before socializing.
I find that total quietness doesn't work for me.....I do best with background music of the classical, symphonic kind. If it's popular music I find myself either humming the words or tapping my pen to the beat. But do remember to pray!