Hanna, Donald E., Glowacki-Dudka, Michelle, and Conceicao-Runlee, Simone.Mitchell, T.R. & Larson, J. R., Jr. (2000). 147 Practical Tips for Teaching Online Groups: Essentials of Web-Based Education. Madison, Wisconsin: Atwood Publishing.
Whether you are facilitating in sticks and bricks (inside a "normal" classroom) or online (as in "distance learning), please review the book listed above. The principles listed apply equally well to both teaching environments. Consider this book a "throne" book which you can pick up, read, and leave at your leisure.
Bens, Ingrid (2000). Facilitating with Ease! San Francisco: Jossey-Bass Inc.
Furthermore, if you strongly believe that student-facilitator interaction is a critical element in your methodology, please review the book listed above. It comes with a CD-ROM of several useful worksheets that you can modify to meet your needs.