Preparing for my first interview in 5 months - 5 months and counting

I get tongue-tied when I am asked about my weaknesses. I am in Tampa, in case local advice matters. The role is similar to my old job as a teaching assistant. What calms you down?

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

I record myself on my phone and listen back. The second try is always better than the first.