try to get in the other guy's head. If they want to chase you...let them chase you for a moment then just when I think they are commited to gaining maximum speed, change the plan. If they think you are going to BnZ them, cut power and glide onto their six, if they think you will continue to turn fight, bring in you flaps as you see them slow down and maximise your speed to string them up. Always do something unexpected when being defensive. Always switch up your methods of attack between passes. If I can manage to work out what the enemy is thinking everything else will flow in my favour.