Be as friendly as possible and always be yourself. Show them what you have to offer and remeber the people in the work place may be watching you. They have an input on if you could be a great asset to their team or not. Dress professionaly and comfortably. Do not wear things like jeans and tee-shirts. Dress to impress, dress to fit the role but keep it professional so if the role requires jeans, tees, and sneakers go above it and show them that you want the job. Don't look like a bum off the street.