Make it hard for a burglar to reach in and unlock your door. Or install double cylinder, dead bolt locks that need to be opened with a key from the inside as well as the outside. Door hinges should always be on the inside and designed so that hinge pin cannot be removed from the outside. Never hide keys outside, such as under a bush, floor mat, or in a flower pot. It's much better to leave a key with a trusted neighbor.
Burglars look for sliding glass doors because they are the easiest to open.
Secure roof openings and exhaust systems. Make sure windows, especially those at ground level, have good locks-and always use the locks you have. The center thumb-turn locks on many standard windows can be easily pried open or reached through a broken pane. Glass block windows offer excellent security for basement windows. Shrubbery and Lighting Make sure all porches and other possible entrances are well lit, with at least 40-watt bulbs.