Unless I have a damn good reason to do a house search it simply ain't going to happen. That reason better be a child or something to that effect.
Other then that I am in my bedroom with my wife, with a piece of furniture in front of a locked door. 911 is on the cell phone.
My wife is covering the only entrance with a Benelli Nova stoked with 7 rounds of 00 buck.
I am covering the only entrance with a Remington 870 Tactical Magnum, Surefire frontend and 8 rounds of 00 buck.
To our backs are several loaded handguns, two additional loaded 12 gauges, a couple AR15s and an M1A scout. Nothing is getting through that door alive the amount of fire that could be put on that small area would be spectacular to say the least.
The reality is we sit on the phone with 911, talk the cops in. Give them a code word, drop the house keys out the window to them when they get here and let them handle the house search and intruder, they have the training and more importantly the backup with training.
One dark evening, take an unloaded gun or air gun and a flashlight and do an house search. You will be amazed at the amount of nooks and crannys that you could be ambushed from.