Who’s at the door?  There’s one easy and fairly inexpensive way to find out, its also a great way of hardening your home.  Here’s a clue…

Peep Hole

Having a peep-hole in an external door will allow you to see who is at the door.  This is crucial because only Superman can see through solid objects.  Knowing who is outside is critical information because the easiest way for a bad guy to gain entry into a home is for somebody to let him in.

I’ll admit that this was one of the last items I installed in my house, years after I put in my security system and exterior lights.  Looking back, it should have been the first item I installed, along with better locks.  Thankfully, my lack of a peep-hole never resulted in any problems but I don’t recommend putting this off.  If you don’t have one installed already, get one installed ASAP because the money you spend on this item (circa $20) can make your home much safer.