THE BEST THING IS TO PRAY FOR THE GOD AND TO READ THE QUERAN ....
yes i think it is one of the best ways.
i will add call your parents if you are faraway from them . For me that make me very optimistic to come back to study, and just forget every thing about studying for 15-30 minutes because if you do any thing other than studying but you still thinking about it you will not refersh your mind.
Good luck for all students