One must enjoy what they do. You must be passionate about the material, confident with the material, enjoy the work surroundings and the people they work with.Prepare for the class, be early, be ready with the material you will be needing on a daily basis. Don't continually leave the room for things you forgot. The students see you aren't ready for them and that can reflect how they percieve and react if you aren't ready and you really don't care about what you do or who you have infront of you. The student's can sence weaknesses in you and your methods and can turn on you in a hurry!