Interview nerves, what actually helps? - what worked for you?

I get tongue-tied when I am asked about my weaknesses. There are 7 people counting on me, so I am trying to be careful. The role is similar to my old job as a pharmacy technician. Any questions to ask at the end?

Thanks for writing this out. I went through something close to it 4 months ago, and it settled down once I kept a simple log of every call and form.