For example, one simple one was taking an axe to the phone terminal box mounted on an exterior wall. Goodbye alarms that used the phone system. I had a big fight with The Phone Company because I wanted the phone box inside. They finally made me sign a paper saying they were not responsible for it, because they didn't have access to it.
The burglar who really wants to get into your house enough to carry an axe... I mean, really?
Have you made sure they can't disable the siren with a foam fire extinguisher? [1] :-)
They managed to only grab a small number of items before the police arrived much sooner than expected. Of course the portly constabulary were unable to chase them through the woods behind our building and they were apprehended weeks later because they were unable to maintain operational security and were talking to their friends too much.
With how much people post on the internet these days, you can case a place rather easily these days.
Traditionally the way this was solved for businesses was with a cellular or (before that) radio back up. My dad's photoshop/darkroom business in Miami in the 70s/80s had a radio connected alarm, but ultimately, a physical barrier (solid barred backdoor, a gate across the windows in front) was the best preventative. The pawn shop in the same strip mall wasn't so lucky: thieves used a sledge hammer to make a hole in the cinder block wall from behind while somehow avoiding setting off the shop's alarm.
I'm still trying to imagine a burglar carrying an axe to break into a house. I saw some crazy shit growing up in Miami and even I can't imagine that.