Interview nerves, what actually helps? after 3 years as an accounts payable clerk

I have an interview on Thursday and my stomach is in knots. I do not usually post, so bear with me. I want to come across as confident and honest. What calms you down?

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

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