Under any sort of attack, keep cool. And if you must shoot, shoot with precision.
A fine marksman is with a second rate rifle is far more effective than the reverse.
Your mind-set is your primary weapon
A smart man only believes half of what he hears, a wise man knows which half.
Owning a handgun doesn't make you armed any more than owning a guitar makes you a musician.
It is high time for society to stop worrying about the criminal, and to let the criminal start worrying about society. And by "society" I mean you.