Catch your subject doing something. Action photos will grab the judges' attention. 

Get close to the action. The photograph should show clearly what the subject is doing.

Consider the background when you compose your photo. You don't want trees growing from peoples' heads.

Plan in advance the shots you want to take, so you're ready when the action begins.

Avoid photoghaphic cliches. Look for new angles to shoot from and different ways to show familiar concepts.

Good luck