I find if I just remember to have fun it calms me down. I try not to think of it as a big deal - just like sparring but a bit harder.

For me being short sighted helps because i can't see the spectators so I wouldn't think about people watching or judging and seriously have fun.

In general they say that those who are process focussed rather than result focussed tend to do better in sport. I wouldn't worry about whether you win or loose. In reality it's all about the experience so either way you do actually win.