I am a parent judge. I had some debate experiences in the past and I have also given many speeches to a variety of audiences in the past. It is important to ensure your arguments are sound, relevant and coherent. In addition to elaborate your arguments with evidence, ensure to address your opponent's points clearly and logically.

Speak clearly and in a reasonable speed.

Be on time, and dress appropriately.

Show respect to each other.

and finally, relax and have fun.

I look forward to seeing you at the tournament.

Over all, I prefer:

1. Clear expression;
2. Well-organized content;
3. Good gesture and voice;
4. Humor;
5. Strong evidence about your topic.