This paper discusses some of the factors that lead to the success of a health information library, including: (1) the mission statement; (2) practical matters such as location, equipment, furniture, and layout; (3) considerations in writing the procedure and policy manual; (4) confidentiality; (5) staff and volunteer training; (6) sources of materials and networking; and (7) public relations. The importance of credibility and confidentiality is emphasized. (MES)