For yourself or for your horse?
Sorry about answer autocorrect you get the point.
I have terrible show nerves. I used and sometimes still I hardly breathed in my O/F class. So take a deep breath in every corner of the ring or just when one is needed. Just remember you got this and let the horse do its job and you do yours.
Well for the horse I walk my medium circles and say good boy . For the rider I count to 50 and back down . Sometimes that doesn't work I hum or sing a song so your focused on something else.