Get a dog.
Exterior lights on an automatic switch, maybe backed up by lights on a motion sensor.
Six foot high privacy fence around permiter of rear of property. All gates should lock from inside with padlocks.
Garage doors should have provision to padlock the door to the roller frame. Stamped metal slide lock through frame is inadequate and can be defeated with a screwdriver, tire iron or catspaw.
Clear shrubbery and vegetation from your house. Don't give cover to the BG's.
Deadbolt and knob locks on all doors. Deadbolts should require a key from both sides. Train yourself and family to put key in accessible, inobvious place when at home, take keys with you when gone.
Sticks or frame locks on sliding glass doors.
Have monitored alarm type A installed.
Post signs for monitored alarm type B.
Plan your home defense strategy if at home when intrusion takes place. Where are you going to fall back to?
Make certain your fall back position includes a way to alert the authorities. Have a backup, such as a cell phone.
Make certain your fall back position includes a way for you to get out, just in case. (fire, too many BG's, etc.)