First interview in 9 weeks - any advice?

After 14 applications I finally got a call for an interview as a security officer. There are 14 people counting on me, so I am trying to be careful. I have not been this excited in months. Any last-minute tips?

Thanks for writing this out. I went through something close to it 4 months ago, and it got easier once I kept a simple log of every call and form.