I have a Taurus PT101 I keep next to my bed at night. I put it away during the day if I'm not carrying it with me because I have small children, who, by the way, are disciplined not to touch daddy's or mommy's guns (stop, don't touch, leave the area, tell an adult).
I definitely believe in crouching behind the bed. It's best not to looking for trouble, and not to alarm the intruder into doing anything desperate, like grabbing on of you children as a hostage.
I leave a couple of lights on in the house so my children can see their way into my bedroom if they need mommy or daddy--usually mommy. It also helps me see who it is. If the lights are turned out, then I'm alarmed--because I know my children sure the heck aren't going to turn the lights out--they're affraid of the dark.
My biggest fear is one of my children being abducted at night. So do I still crouch behind my bed, or go to see if my children are okay? I hope leaving some lights on would deter most burglars. Perhaps turning the lights off would be better. That way, any intruder would trip over toys left scattered on the floor.
Some burlars are very skilled. I remember the I-75 Cat-burglar in Florida, back in 1990 (I think that year is correct). The son-of-a-gun helped himself to the fridge, made himself a sandwich and even drank a beer. He even used the toilet in one house. For several months, he burlarized hundreds of houses, at night with the owners at home, along I-75 near Lake City, Gainesville and Ocala, before retiring after being shot at with a shotgun. To my knowledge, he was never caught. We was believed to be wounded.