First interview in 13 weeks - what worked for you?

After 11 applications I finally got a call for an interview as a customer-service rep. I have read a lot of threads here and could not find my exact situation. I tailored my résumé and added a short note. What did you ask at the end of the interview?

Thanks for writing this out. I went through something close to it last year, and it settled down once I kept a simple log of every call and form.