Post it by the phone, along with numbers for a neighbor and emergency - police and fire departments, paramedics, and the poision control center. Have your child check in with you or a neighbor when he or she gets home. Agree on rules for having friends over and going to a friend's house when no adult is home. Make sure your child knows how to use the window and door locks. Tell your child not to let anyone into the home without your permission, and never to let a caller at the door or on the phone know there's no adult home.
Kids can always say their parents are busy and take a message.
Work out an escape plan in case of fire or other emergencies. Rehearse with your child.