There is a precept among security practitioners in that prevention is the best policy when it comes to personal security. Good prevention strategy can disrupt 95% of all schemes. That said it is clear that even the most aware person can be get distracted and fall victim to a clever thief. Overreacting during a mugging is most dangerous. Only 5% of all disruptions strategies are successful once the criminal has pounced on his victim. To improve your chances of fending off an attack it is recommendable to know how to handle yourselves through self-defense.
Just remember to be sensible in your actions before you assume a defense posture, evaluate your chances of repelling the attack, and walking away from the ordeal unhurt.