Communication is definitely key. I use communication in a variety of ways in my online courses. I make 3-4 announcements a week. I email them once a week in regard to the academic progress. I also conduct a weekly live lecture and I contact them via phone 2-3 times throughout the term. The various types of communication assures the students that there is truly someone one on the other end of the computer. Someone that cares about their progress and success.