I'll say "wow" also since that's the first time I've seen a "Dislike" for a brand new member's first post . Seems a tad harsh... Gave it a "Like" just to give the guy a little bit better opinion of the forum.
Just take a deep breath, slowly exhale and relax. Either you know the subject matter, or you don't. No point in getting yourself all tensed up about it now.
1) Have you kept up with the class during the year?
2) Do you study alone or with a partner or two?
If you have kept up, just review the exercises you have done. If you have a partner(s), one approach is to split up the problems and then each person explains his answers to the other. The basic principle is that teaching is the best way to learn a subject.
Should have paid attention during that physics section on time travel so you could have went back in time and paid more attention in class.
Ever notice that guy who sat up front yet there was also that guy in the back who looked almost exactly like him but was paying more attention? Guess what section he read up on. (Twice.)