Interview nerves, what actually helps? (Knoxville)

I get tongue-tied when I am asked about my weaknesses. There are 10 people counting on me, so I am trying to be careful. I want to come across as confident and honest. Any questions to ask at the end?

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.

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