Think about ALL the important issues in your case. The court will give you a limited amount of time to present your side, so use your time wisely! People often emphasize the wrong issues or try to change the issue by smearing their opponent or by producing information that has nothing to do with the issues of the case. These common tactics are mistakes.
Another great strategy is to make a list of what your opponent would say about the case and why they think they are right. Once you have determined your opponent's arguments, make a list of why you disagree with your opponent and why you think you are right.