Preparing for my first interview in 7 months - 6 weeks in

I have an interview on Wednesday 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 7 months ago, and it got easier once I kept a simple log of every call and form.