Participate in class sessions. It not only is required in most online classes, but it also helps take away the isolated feeling that you may get when you're sitting alone in front of your computer. The more you participate, the more you will feel a part of the class. Communicate regularly with your instructor. Don't hesitate to contact your instructor if you have questions about the course, or to update him or her on your progress.
Instructors are available by phone or email.
Find a study partner. In most online classes, email addresses of your classmates are available. If the course does not require any group work, find a person in your class that you can email and communicate with regularly. Discussing the course with a classmate may be very helpful in understanding the curriculum and completing assignments. Try to log-on to your course more than a couple times a week.