Preparing for my first interview in 9 months - what worked for you?

I get tongue-tied when I am asked about my weaknesses. I am in Pittsburgh, in case local advice matters. I have practised answers but they sound stiff. What calms you down?

Thanks for writing this out. I went through something close to it 9 months ago, and it settled down once I kept a simple log of every call and form.

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