Get organized early.
There is nothing worse than showing up to class unprepared, especially if it's an upper level class with other experienced and organized students. Get your books, make a calendar, and get ahead.
Get into a schedule.
Plan out when you're going to wake up, eat your meals, and get your activities in. This will help you with time management, and prevent you from being lazy and disorganized. This can also show you how much free time you have to go do fun things like hang out with your friends or binge your favorite Netflix series!
Drink a lot of water.
Whether you're on the seventh day of your week-long partying bender, or just a little bit tired, drinking enough water each day is the easiest way to feel more energized and awake. I am constantly chugging water bottles throughout the day, and I've felt amazing ever since I started.
Keep in contact with your parents.
A little taste of home, even if it's just a quick phone call, can get you through the day. And, no matter how much you miss your family, chances are they miss you more. Whenever you have a few minutes, like walking to/from class or on a study break, call a parent or a sibling. It'll make their day, and probably yours!
This is probably the only week you don't have a serious boatload of work to do all semester. So, get up, go to your friend's place, and cherish the time you have before homework and exams start! My friends are the only thing keeping me sane in this crazy college world, so I've been spending all week with them.