What you said actually means the following:
keep your head on a swivel and don't space out so much you stop being aware of your surroundings
if you got your ears plugged in listening to the latest on your ipod - you are screwed unless you do keep your head on a swivel.
Secondly - people are the most vulnerable nearest their homes because they are almost home and let their guard down because they are almost home.
So neighborhood stalkers who stalk the neighborhoods take advantage of this and try to zero in on locals in their own hoods.
BE AWARE THE MOST NEAREST YOUR HOME - NOT THAT YOU SHOULDN'T BE THE AWAREST AWAY FROM YOUR HOME - JUST BE AWARE EVERYWHERE - PARANOIA RULES - THEY REALLY ARE OUT TO GET YOU .....
Secondly if you do have a handgun - then as the old saying goes - practice makes perfect - this means regularly combat training firing ranges - a couple times month minimum - then carry and screw the permity - it's your life - you protect you.