Well, my experience is that if there's a fire in my house, I get out. Of course, my kids are gone now, but even when they were home, I always figured I stood the best chance of saving anyone if I am not incapacitated, and have a good plan.

That said, I make it a regular practice to walk through the house in the dark. It isn't 100% blindness, but it is a perspective change. Occasionally I will challenge myself by getting out of bed in the middle of the night and trying it while still in the fog of wakening. That is a bit more of a challenge, even though I am a very light sleeper.

I've also occasionally just sat in the dark in various parts of the house and just listened to what's going on at 2:00 am. Sometimes I will go out in the back yard and sit in the bushes for an hour and just watch the house and the road.

Heaven help the poor sod who happens to try breaking into my house at night whilst I might be sitting behind the rhodoendron or fern bush, with sword in one hand, Glock in the other, and a headlight shining in their surprised face.