well.... i get startled enough when i realize that im late for class....roll about of bed and get dressed and get all my class supplies and im out the door and i feel alert...if someone were breaking into my house i think i would be even more alert....
I keep a chambered G17 in one of our handgun safes bolted to my bed frame. I choose to leave the door open at night since no kids in the house anymore. My gun remains holstered with the trigger covered yet very accessible. The gun is ALWAYS in the exact same position right next to my pillow. No fumbling and trying to position or grip correctly while half asleep or in the dark. Very easy and consistent which I believe helps reduce the chance of an accident.
One thing that I haven't seen anyone really mention is a light source. My wife and I both keep flashlights with our guns. In addition, my wife also a has weapon mounted light. Its very important to be able to identify the threat.