Make communication a priority by utilizing Blackboard and email. Be responsive to student questions and concerns in a timely manner. Students will appreciate an instructor who details his/her expectations up front in the syllabus and who gives regular guidance and feedback.
The Learning-Centered Syllabi Workshop by Lee Haugen at Iowa State University will help facilitate syllabi that make students aware of your expectations. Link to workshop online: http://www.celt.iastate.edu/teaching/syllabi.html