I support shoot and then take cover and concealment if possible, and definitely move to a new position. I do NOT support "run" or "flee" your house (YOUR domain which YOU know), that gives me images of the homeowner bailing into the backyard into two more thugs who may or may not be privy to what just went down.
Also, a "home break-in" and a "home invasion" are typically different things. A
home break in typically involves less organized dudes, typically not rocket scientists, who may have seen your empty 100 inch plasma TV box for trash pickup and now decided you are not home, and want the TV (but you indeed are home). These types of guys typically met in jail and are out now, and have no loyalty to each other. If they break in and threaten you with a screwdriver or something, well they just met Smith and Wesson. However they are not going to "call in reinforcements" or "run to the car to get a weapon" and come back after you. They are gonna haul a** and never look back.
A home break in is done via an unlocked window/door, or pulling a screen door off.
A
home invasion is a dangerous event, involving organized, smarter, almost always heavily armed, criminals, almost always two or more, working as a coordinated team. They are looking for drugs and/or money, for some reason they believe your house contains the above. You stay at home wife and baby girl may be tied-up (until they find "the drugs"), killed, or kidnapped until you cough up the money or drugs. Again, a home invasion is a dangerous situation.
A home invasion typically comes right thru the front door, even the crooks using a "ram" or entry device, or by coming in thru the garage. Locked or unlocked, they are not "picking locks" or stuff like that, they are coming thru the door, dynamically and swiftly !
Another poster put a link to the San Antonio news home invasion. Yes it is a dangerous world. However victims of home invasions are usually involved in less than Saintly activities themselves and may have "had it coming." Not every case, obviously.
I think a good program/system for home defense (versus just "get a shotgun") is well-lit exterior, alarms/door chimes, cameras, a dog that barks alot, and burglar bars/physical barriers, some folks have those "cages" or whatever you call them in front of the front door.
I never liked my front door exposed with every Joe Tom and Harry could walk right up to my front door and knock on it. So the above might be something to think about.
Also, have an agreed upon security plan in the family ! If dad says "take cover" or whatever "Code Red" that means go to Room-X and do XXX. The all clear is code word "Amarillo" or similar. Someone is assigned to call 911 and STAY on 911 until police arrive. Give police dad's clothing description etc. Then dad takes care of business.
Also, if strangers knock on the door (common sense, but...) or call the house, the kids need to have an authentication password. "Hello Julie, your mom is in the hospital, you need to come with us". If Julie says ok, are you having a good day (security prompt question) and the answer is "sesame street" then boom, mom really IS in the hospital. If the answer is uh, what Julie, yes we are having a good day, uh what then Julie needs to call 911 or appropriate responsible adults depending on the situation.
Home defense needs to be shotgun or pistol but well trained and current on tactics.
Also YOU the homeowner has tactical advantage. attack from the DARK and maintain tactical advantage !!!!! Do not "shoot to wound" etc. Chest shots and head shots !!!! If he goes down and is still moving, continue shooting until YOUR PERCEPTION OF THE THREAT is no more threat. Todays criminal is drugged, crazy, motivated, and may still be alive to hurt you even after he "goes down"
Also remember that criminals may do surveillance/site surveys of your house. One example is the "lost dog guy" who is a claimed guy looking for a lost dog. He may have knocked on your door last week looking for a dog. He may even do this a few days in a row, testing your occupants and testing weaknesses in his "target" (you/your house). The overly nice guy may be targeted before the a-hole, aggresive, "no bro, no lost dogs here, whats your name, where you from, I see you again I am calling the cops" answer.
*** if you are pulling the gun out, prepare to take it all the way to the end and not "wave it around and warn them". Be ready to take care of business !
Just some thoughts.