The Rules:
1. Have Fun
2. Celebrate the Successes
3. Learn From the Failures
Competitions are an undertaking. Remember to be courteous to those around you, and especially your team. A loud and angry Captain is always on display for everyone around. Don't be hard on yourself, afterall this is new. See rule #1.
No matter what, we always learn something new from a cook, practice or otherwise. I think the key to being successful, is understanding how all the components come together and how they affect each other. Also, recognizing areas of improvements, and being able to honestly evaluate and implement those changes, will help your team's growth and development.
Competitive cooks (and judges) have healthy egos, and opinions. If you share your turn ins with those around you, share with the understanding that you have invited a critique and be ready for an evaluation. Good, bad, or indifferent. Sometimes you get honest feedback, sometimes not. Either way, have a keen knowledge of what you liked, didn't like, and what did well.
Good luck, and let us know how you do.