I am pretty sure I was born a nervous person. I was born shy and I had a lot of problems getting in front of people( now I can do it with ease). I think what helped me out is that I started to focused sololy on what I had to do. For example, I would put all my engery into the notes I was about to play and everything needed to play it right. I would zone out the audience and just focus on my hands and guitar and the music. Nothing else. Of course that gives a bad show for the audience, but after a while I got the confedence knowing I could play a good live set and I eventually let loose and went wild. The first time it was really weird, but after hearing how great I did, I realized it was worth feeling stupid. I hope it helps

-Ralph