Like stated previously. Show up early, dressed to impress. Do a google search for common FF interview questions or common ems interview questions. Review the questions and practice your response so if you are asked a similar question in the interview you will be prepared and confident. Do some research on the company.. including their history and their mission statement. Be honest and sincere in the interview and you should be ok.
I would also print on a few resumes and at the start of the interview you can give it to the people conducting the interview.