Interview nerves, what actually helps?

It has been 5 months since my last interview and I feel rusty. Thank you in advance. The role is similar to my old job as a call-centre agent. Any questions to ask at the end?

I record myself on my phone and listen back. The second try is always better than the first.

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