Honey says sex helps him to relax before a performance. You could try that. Someone famous (I have no idea who) said that if you're really nervous, just picture everyone naked. Sometimes I just do it for fun ;-)Seriously, in all the speech and composition classes I've taken the secret is always to be prepared. If you know what your next step is, it's a heck of a lot easier.
And as everyone has already mentioned, relax and enjoy.
Love, annamill