I investigated a fair number of residential burglaries over the years. In my opinion, an alarm system that goes to a central monitoring site is money well spent. It limits the time a burglar has to toss your home. An alarm system that sounds a loud audable alarm is also helpful, as it can scare someone away, especially if their are neighbors nearby.
A quality fire rated safe for guns and other easy to carry valuables is also a wise move.
Good deadbolts on your doors make a difference, but I have found that many burglars will by-pass a secured door, and go thru a window, if one is present at ground level, and large enough. Motion detectors in addition to sensors on doors make a lot of sense.
Check the legality in your area, but in my case, my "gun den", that contains my reloading bench and safes, has no windows, a dead bolted, solid door, and a nifty little device that when armed, will flood the room with a bulk can of pepper spray. You can find them on the internet.
Even if they don't bite, dogs can be a good deterrent / early warning system. My GS misses nothing, and even friends are wary of entering the house, even though he is a 115 lbs lap dog..
When I am away for any length of time, I usually leave a few lights on in the house, and a radio playing, along with one of my vehicles parked in the drive, to give the appearance of someone being home.
Not always, but most burglars look for the safest and easiest targets, and prefer unoccupied homes. None of the above will stop all break ins, but will limit the possibility and minimize the loss.
Larry