Interview nerves, what actually helps? after 8 years as a retail manager

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. How do you prepare answers?

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.