My first game...

[SF]

A good strong whistle. Louder than you expect you would need to - really blast that thing. Have a neat appearance, sharp mechanics, hustle and don't become flustered. Even if you miss a call (or calls), you're most definitely not the only one. Remember what you've learned to this point, and take a couple moments afterward to reflect on the game. I do this to remind myself of things I've done well and things I need to work on. Also, if you have a veteran partner, ask them to watch you and give you some constructive criticism.