1. Don't be afraid to voice your concerns. Chances are they have no idea that what they're doing is bothering you. It may be awkward but it'll be worth it in the end.
2. Be considerate. If you ever want them to be considerate of you it's best if you show you're willing to do the same for them.
3. Coordinate your schedules. Everyone wants to be able to have some time to themselves in their own room. This goes for sleeping too. If your schedules conflict completely try to find a way to compromise with what lights stay on or what level of noise is acceptable during what times of the day.
4. Choose wisely and be honest about yourself and your habits. If you're not your roommate may end up resenting you for it or vice versa and that's not the living situation you want.
5. Don't be afraid to do you. Don't forget it's your room too. Stand up for yourself when the situation arises.
