Interview nerves, what actually helps? after 6 years as a call-centre agent

It has been 13 months since my last interview and I feel rusty. There are 6 people counting on me, so I am trying to be careful. The role is similar to my old job as a call-centre agent. Any questions to ask at the end?

Arrive early, drink water and take a slow breath before you walk in. It sounds simple but it helps.