I don't know if my approach has any real value, but it makes sense to me and costs very little.
1) ON front door--- put a door bar on there when you go to sleep. Same for door from the garage into the house.
These cost about 25 bucks at Target. If you shop around you can find some in the same price range which have built in
2) Put up some Beware of Dog signs. Doesn't matter if you don't have a dog.
Having a dog is better, but the signs are a minor deterrent unless its a dognapper.
3) As already mentioned, and if your garage door opener can be fixed up this way, change the code. If you can't change the
code chances are it changes automatically -- on a more modern unit anyway, so that won't be an issue.
4) If you buy an inexpensive sound activated electric switch or remote activated electric switch, you can plug it into
the outlet your garage door opener gets its power from. Turn the power to the garage door opener off when you go to bed.
5) Pay serious attention to that side garage door. I put an exterior screen door on; then bolted some bars across the aluminum
frame, and put a combo lock on the inside. Its not fool proof. But it will sure as heck slow someone who thinks they can
ambulate into your garage and ambush you there or gain entry to the house from there.
6) Harbour Freight sells very inexpensive excellent driveway alarms. Mount a couple in your garage so you know
if someone gets in there before they break into the house from the garage. These are inexpensive -- the C cells needed
and the 9 volt needed cost almost as much as the alarm. Use two. It will keep you from getting spooked if one
goes off for not reason; pretty rare actually with the ones I have, but I did once get awakened by a false alert at 2 AM.
With 2 in there, you can probably ignore just one alerting.
7) Harbour Freight again. They sell nice little window alarms that stick on to your window and will make lots of noise
if someone so much as touches the glass hard. Seriously, they cost 5 bucks for a package of 2, batteries included. You can't replace the batteries for that price. I don't think their real value is in the alarm per se, though that might give you
a few seconds wake up. The real value is the message sent to someone looking at your house. They know there is some sort of alarm system, but probably don't know how feeble it is. They also don't know what else you might have. Maybe they'll go find an easier place. I've got something like 17 of these on my windows. Never have a false alarm. They only go off if you happen to bang something against the glass.
8) Depending on your location and climate, you might be able to mount some motion activated solar flood lights on the outside.
Not the cheapest stuff, but you don't need an electrician to run weatherproof boxes to the eves and gables.
9) Old work-boots-- dirty. EXTRA LARGE. Leave at front door. Leave on back patio. Check out the stores that sell used
clothes for el-cheapo stuff. Leave the impression there is a tough working man inside.
10) No NRA signs, CC signs, Hunting oriented signs or pics or stuff that can be seen from the outside. It all says
there might be guns worth stealing inside.