Is commonsense stuff. Good lights, motion lights, battery operated lights, good locks, and a security system, even if only a ferocious Jack Russel or 3.
And a shotgun, be it a .410, 20 ga, 12 ga. Birdshot at 10 to 20 feet as most rooms are, should pretty well cover it.
Oh and a good flashlight…
When all else fails..claymores…