Homeplace - Art's Stuff has a very graphic reminder why we should always place safety in the forefront of our minds, whenever we're around guns. You should go there right now and check it out.
Once you been around guns for a while it's very easy to become lax, to think that you've "been there, done that," that you're an "old hand," that accidents only happen to "newbies." But they can happen to anyone. It only takes a split second of carelessness for a negligent discharge. A split second that might change your life forever.
1 - All guns are always loaded.
2 - Never let the muzzle cover anything you are not willing to destroy.
3 - Keep your finger off the trigger until your sights are on the target.
4 - Identify your target, and what is beyond.