Introduce yourself in the letter. Tell your roommate your name, nickname, age, hometown and area of study.
Go into detail about your personal life. Give the roommate information about your family and how you live your day-to-day life. Write about your favorite activities and your hobbies.
Explain your personality traits and habits that may indicate what type of roommate you will be. For example, let the roommate know if you are messy, when and where you typically study and whether you are a party animal or a home body.
Write about your expectations of a roommate. Your feelings regarding guest visits may be a topic to discuss.
Give your contact information to your future roommate, in case he wants to write you back. Write your address, phone number and email information at the end of the letter, and request a letter back from him.