Interview nerves, what actually helps? - what worked for you?

I have an interview on Monday and my stomach is in knots. There are 3 people counting on me, so I am trying to be careful. The role is similar to my old job as a warehouse supervisor. Any questions to ask at the end?

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.