Establish some rules at the beginning. Make your preferences known from the start so you and your roommate are clear on what to do to avoid conflict. Establish what space is whose, when you need quiet time to study, which items you can share, what time you go to bed, if you like to sleep in on weekends and who’s allowed to eat what in the refrigerator. Some residence halls even require roommates to write up a roommate contract to put your rules in writing. Perhaps this is something you and your roommate could do on your own. Make it a fun introductory exercise and hang your contract somewhere in your room as a reminder.