[DonRotolo]

Practice Gracious Professionalism. The whole team needs to do this.

Here's an example: What is it that most everyone on your team has been doing these past few months? Yes, Building Robots. Do you all enjoy building robots? Yes? OK then, when you get to your competition, anyone who isn't actively building (repairing/tweaking) your team's robot (or otherwise doing something important) should be helping other teams, any way they need. Isn't that the fun part anyway???

We know what being gracious is, right?
And can we stop being kids long enough to act as professionally as possible? There you go.

Another example: One student (in a team T-Shirt) is acting like an idiot. s/he is (running/fooling around/being annoying/obnoxious/unsafe/etc.). A judge sees that - oh well there goes your chance. The whole team represents the whole team. One team member can ruin it for everyone.