Enrollment in online courses is increasing in colleges and universities across the country. The Association of College and Research Libraries calls librarians to provide equivalent services to online and face-to-face students. The provision of library services to online students requires more collaboration with instructors than in the face-to-face classroom. Collaborative efforts must usually be initiated by the librarian. This paper will discuss relationships with faculty, methods of developing relationships, ways to collaborate in the online environment, techniques to expand collaborative opportunities, and how librarians must prepare to be effective collaborators.