Interview nerves, what actually helps? (Boston)

I have an interview on Thursday and my stomach is in knots. I want to come across as confident and honest. 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.

Thanks for writing this out. I went through something close to it 11 months ago, and it got easier once I kept a simple log of every call and form.