Utilizing good time mangement is very important for an instructor to master. It sets the mood of your day. Everyone at some point might be late coming into a classroom without time to go through your lecture notes or syllubus. Its those times when the instructor feels unorganized and frazzled and the students will sense that. Try to set your schedule up the day before so they you can briefly review what needs to be done in class. Its a good idea to write on the board a list of topics that you will be covering during your class time so that the students will now exactly what is going on for that day.