Lights deter crime so make sure they are on....Also, dogs deter crime, especially loud barking ones!
i agree with you on the lights, and a dog to be used to deter some slime of the earth from messing around. i have a boxer and when a animal is on the lawn he has a certain bark , but when a person comes around or walks in the yard the dog has a deeper bark that makes me aware that someone is on my property. that bark is an early warning to me , then i can get the guns out and (lock & load).