Firearms are dangerous tools. The techniques described in Gunfighting 101 are dangerous to learn, and to practice. Follow the rules of gun safety and treat firearms with the respect they deserve and they will be dangerous to your enemies, rather than yourself, or your friends and loved ones.
While this site attempts to describe concepts and techniques as completely and clearly as possible, there is no substitute for in-person instruction from a qualified instructor. I would encourage everyone who intends to use a firearm for self defense to seek out such instruction.