Some tips I've been given over the years. Some of these have already been mentioned, but here ya go:
1. Ditto on the gate. Make it just a tad bit more difficult to get onto/off of your property with stuff. Fencing helps too, even just a few strands of barbed wire. Things like that won't prevent a prepared or determined thief, but it will make your place less likely to be scavenged on the spur of the moment.
2. Ditto on the firearms. Yes, we have kids and they know they are allowed to handle/use some of them under our close supervision. And ONLY then. We keep ours on hip when we're out & about in town or on the property and close by the rest of the time. I gotta give props to tritium sites. It's easy to grab your firearm when you can see 3 glowing dots no matter how dark it is. And thank GOD for Castle Doctrine laws
3. Pay the extra money for a PO Box to prevent any check/identity theft.
4. Single folks, keep a few things that obviously belong to the opposite sex. Whenever someone comes in your home, be it plumbing, phone tech, whatever, put away "Fred's/Margaret's things". Keep 2 toothbrushes on the sink, an old overcoat laid on a chair, houseshoes, street shoes, etc. This makes it less likely someone will take you for an easy target because you live alone.
5. Loud (And I mean LOUD) window & door alarms are fairly cheap & easy to install. Good for startling intruders & alerting close neighbors. (If you have any close neighbors

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