How can I overcome nerves and stress?

I do breathing exercises, some meditation. A Google recruiter sent me an email saying, "Just be yourself, have confidence" I can't really remember the quote that she said, but she said something like, "Be confident on your skills and what you've done and everything will be smooth." And I try and keep that in mind because at the end of the day I don't have to sell myself. I am just going to have a conversation about my job experience and that's what I am trying to keep in mind when I have a job interview. I'm not saying it is easy, its not easy and the stress is always there, but it helps thinking that you don't have to sell yourself, you just have to talk about your experience, what you've done, what you haven't done, that's it.