The police department recommends that you have alarms professionally installed. If a burglar gets past your perimeter alarm system, there should be a secondary alarm system inside. The other is some type of sonic detector that senses motion in a room. Dogs Dogs are a good deterrent - burglars will generally avoid a house with a dog. But they aren't foolproof - most dogs tend to be too friendly.
Many burglars enter homes through poorly protected sliding glass doors.
Additional locks and security measures here will prevent the door from being opened or lifted out of the track. Screws installed in the track above the sliding door frame will prevent the door from being lifted out of the track. Drill a pilot hole in the top track above, and slightly in, from each corner of the sliding door frame section and install a screw into each hole. Adjust the screws so that the head of the screw just barely clears the frame when it is moved back and forth. Auxiliary patio door locks may also be purchased and install easily.