Bring your current resume. Come dressed professional. If offered the position, you will be required to wear a suit and tie if you a guy and a blazer if you are a girl. Be prepared to talk about your goals. Having 1, 2 and 5 year goals is helpful. No previous experience is required, as it is entry level, but they will want to see that you plan on going somewhere, as the job is not easy and requires a lot of self discipline.