I think this depends on what kind of class it is:
*A class I am interested in: Sit towards the front, take active part in the discussion, and take lots of notes!
*A class I am not too interested in: Sit towards the back, pass a note or two to my friend next to me, read about the LSATs, or doodle where my notes should be.
*A class I
know I need to make a good grade in whether I am interested in the class or not : Sit front & center with a shirt that says "I LOVE STATS" (or whatever other class it may be)