Something not mentioned is secure doors and windows.
Around 2/3rd of all home breakins are through the door. The rest are through windows(I know, Captain Obvious
) Maybe through a wall once in a blue moon.
Get your doors secured. The weakest point of a door is the frame. Get something like a EZ Armour door jamb kit from Lowes about $70.
Get a door and lock reinforcement kit, $30.
Get some 3" or 4" wood screws for the door hinges(about .50 each)
Get a latch shield, $8
Get a security door brace from Lowes about $20
Get a few 'Beware of Dog' signs, $2 each.
Find you some of those 'Home protected by XYZ Security systems' signs.
Get some of those electronic 'screechers' that emit a loud, ear piercing sound when a door or window is opened. That sound alone will send a thug running. About $20 for a pair.
Get some of those sticky bushes planted around you windows.
Get motion-lights installed. Not overly expensive as you would think.
Get a good yapping dog. Don't get one like I have which will bark at a cricket.
Most theives are pretty dumb and are looking for a quick, easy hit.
There are the 'professional' thiefs that are pretty sophisicated but the harder it is to get in your home, they just may decide to pass on your home.