1)Always keep your firearm pointed in a safe direction.
2)Treat ALL firearms as if they were loaded.
3)Keep your trigger finger outside the guard and off of the trigger until you are ready to fire.
4)Be certain of your target, your line of fire, and what lies beyond your target.
5)Always wear appropriate eye and ear protection when shooting and maintaining your firearm.
(I believe there should be a #6, for pity's sake)
6) Bullets are the projectile portion of standard hand gun and long gun ammunition, commonly formed from lead, often encased in a copper jacket.