Interview nerves, what actually helps? (update)

I have an interview on Tuesday and my stomach is in knots. I have been trying to stay organised about it. I want to come across as confident and honest.

Prepare three stories with a clear beginning, action and result, and adapt them to the questions.

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