Roommate Matching is really useful in this situation. You will fill in a form where you will give your preferences for a roommate. If you are working on your thesis and need a lot of quiet time you won’t want to be matched with someone who plays loud music at 4am. Similarly, if you are allergic to cats you won’t want to live with someone who has four. The questions will usually also cover issues like smoking, cleaning, pets, drinking, and study habits. You will also have the option to say if you want to be matched with male or female roommates.