Interview nerves, what actually helps? (Dallas)

I have an interview on Tuesday and my stomach is in knots. I want to come across as confident and honest. How do you prepare answers?

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.