We have a long (3/8 mile) steep driveway.
Posted land is #1, must. (Gives you a defence if someone gets hurt trespassing on your land.) A gate on our road to slow them down. Driveway sensors to let us know there's someone coming. Wireless (closed circuit) cameras, to see who. (For rural areas like us) night vision goggles. 4 wheeler parked on rear ramp ready to roll. Excavator (many uses) parked just right, to blow out the burm wall of our pond. Which would release enough water down our driveway that there would be nothing left. (Oops 100,000 + gallons coming at Yah..!!)
Thats just a few defensive measures, I have many more.
@doublejj , I really need to get me some body armor.