Know your opponents' school colors. You cannot afford to focus on one team or one individual.
Revenge is a very poor motivater and can be a huge distracter.
The danger is that you might be focusing on one competitor and staying with him or her, not aware that he or she is running one of the worst times of the season. Before the light bulb goes on in your head, it may be too late, and you have let a group of runners move out in front where you cannot overtake them. Fast starts don't accomplish much. Pace yourself but don't let the pack get too far ahead. Make your move in the last mile.