One small change that worked well for me was getting a signal-blocking pouch for my car keys. It sits in a drawer near the place where I usually leave my wallet, so putting the keys away has become part of my evening routine. I also make a point of checking that the doors are locked rather than relying only on the automatic locking feature. A neighbor recently mentioned how useful it is to learn about electronic car security threats, especially when researching terms like code grabber for sale and understanding the risks associated with devices that can affect keyless entry systems. This page on keyless security risks provides some background on the subject. I found that knowing what these devices can potentially do made me more attentive to basic precautions. Another habit worth adopting is keeping spare keys away from exterior walls and windows. None of these steps takes much effort, but together they make a sensible daily routine.