Leaving the inside lights on
A light that is always on is no more of a deterrent than a dark house. In fact, it helps burglars see well once they are inside.
It is better to use timers that turn lights on and off in different parts of the house at different intervals. In addition, purchase motion detectors that turn on lights or appliances if someone enters the house. A home with a well-lit home exterior is much less likely to be broken into, so fully illuminate your house with motion-detector spotlights and other strategic light fixtures.
Hiding a spare key
Never hide spare keys in “secret” places outside your home, because smart snoops know which flowerpots to look under. Be smart about issuing spare keys. Even though you may be careful about who they are issued to, you cannot control the people to which they may have contact that may expose the key to duplication or theft.
Relying on memory
Perhaps the most important security measure of all is to document your home’s contents, particularly the valuables. Get out the video camera and take a thorough tour of your home, and then keep a copy of the tape and any other helpful documentation in your safe deposit box.