The "Four Rules"
1.All guns are always loaded.
2.Never point the gun at anything you are not willing to destroy.
3.Keep your finger off the trigger until your sights are on target (and you have made the decision to shoot).
4.Be sure of your target and what is beyond it.
When hunting, know where your muzzle is pointing, but also know where your buddy's muzzle is pointing.
Don't hunt with folks you wouldn't trust your life with - because you are.
Big bores and high velocity don't beat a gun you can make accurate shots with
Don't use your scope as binoculars, don't climb into a stand or over a fence with a loaded gun
Identify your target 100%, don't fire if there is any doubt.