mind thinking..

Keeping myself free for 5 days continuously, my brain has non-stop thinking of all kinds of things, how should i overcome the next term lectures? can i really do well in the exam? how to improve my knowledge? huh. i wonder why am i thinking all those stuff, perhaps i'm too free and nothing else to do? I need to get my time filled up, or else i would be dead of giving myself pressure. Any other good suggestion to relax myself? >.<