1) Read one page at least three times. Make sure you look at the pictures (if there are any) so your mind wouldn't wander off into a different subject.
2) if you're tired, eat or watch t.v for about 10 - 15 minutes. then, go back to studying.
3) pretend like studying is like reading your favorite book
4) think about getting that A tomorrow and probably that would encourage you
5) if your restless again, go take a shower
6) sleep early !
7) wish you the best!
P.S. for review, do a sorta trivia game