Windows and doors are, obviously, the two most common entry points for burglars. Fortifying them can start with near-zero cost, then grow from there as your needs and budget allows.

Before you buy anything, take a good review of your home and your habits.

Do you leave keys under the mat near doors? Do you leave a window unlocked? Do you have open doggie doors that don’t get locked when you leave the home? Securing all the possible entrances is the first, and most obvious, line of defense against break-ins.