Eric Puryear shares some examples of self defense by people caught by surprise by attackers. One free piece of advice I have for anyone interested: don't open your door to anyone if you're not armed. I put my gun on in the morning when I put my pants on, and I never open the door without my pants. Additionally, don't open your door at all to a stranger - communicate through the door & tell him or her to leave the package on the doorstep. If you end up being attacked at the door it is much quicker to retrieve your handgun from the holster you're already wearing than it is to run to your bedroom.