I would first of all "harden" your perimeter: e.g.; door and window locks. Plant thorn bushes under the windows (but don't lose your keys!). Dogs are a good early warning system, even little ones. So are Siamese cats for that matter.
I'd be careful who I opened the door to and wouldn't open it at all at night unless I knew who was coming. I'd know exactly where other people in the house were at all times, especially kids. It's a lesson in situational awareness inside your house.