I find the best way to deal with interview anxiety is to practice and have answers ready for the questions they might ask. That way you won't get flummoxed on the spot. Google job interview questions then write out and practice answering OUT LOUD what your responses will be.

And remember, they are just people too. They aren't any better than you because they have a job and are interviewing you. And remember also, that you are interviewing them too. Have some questions ready to ask them about the positions to make sure that it's a good fit for you.

Good luck!
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