Winter’s bitter cold or summer’s searing heat can entice even the most cautious drivers to let the car warm up or cool down while they're comfortably ensconced inside the house. But doing this makes it really, really easy for thieves to steal your car or rapidly remove any valuables left inside. A few minutes of comfort are simply not worth the risk. Similarly, don’t leave the car running while you dash into a store to run an errand—this is just asking for trouble. In fact, in at least 30 states it is illegal to leave a car running and unattended.
Related: 8 Easy Ways to Winter-Proof Your Car