Install locks or secondary security devices on all accessible windows so they can't be opened far enough for someone to crawl through from the outside.

A door that locks from the inside is great — but it needs to lock on the outside as well!

If you have the same key for all your locks, have one door re-keyed and use that key to give to contractors or visitors. If the key is lost, you will only have to change one lock on your house.

Keeping your door open during the day may let in the sunlight ... and thieves! So install a storm door with a lock to keep sunlight in — and burglars out.

Place security bars over your basement windows and around your home's removable AC units to prevent intruders from crawling inside.

A peephole allows you to see who is at your door without having to open it and without them looking into your home.

Leave a car in your driveway, or ask a neighbor to park there.

Leave shades, curtains and blinds in their normal positions. Covered windows during the daytime indicate an empty house.