In light of the news coming out regarding Linda Frickey, victim of fatal carjacking, I wanted to remind the ladies on the board to lock the doors to your vehicle as soon as you get in.
Getting everything situated in the car can wait.
Lock your doors.
This is probably the only thing that would've made a difference in her case, and certainly the tool most available to all. No weapon can defend against being caught in a surprise attack by 4 people.