I have taught for years and I still go into my class room a day or two before the class begins to get the feel of the room and make sure I know where everything is and how it works. I am always there before the students arrive. I start on time and explain how I will proceed in the class. I try to make the students feel comfortable. I don't rush the class. Remember the syllabus is a contract between you and the student. Take time to prepare it completely. You will lose the class quickly if they don't think you know your material or are prepared for your classes.