 Even when your child is not traveling with you, Dr. Thomas suggests keeping something of yours in the backseat. Whether it's your jacket or your purse, a laptop bag, something of yours that at the end of the trip you have to go to the backseat to go retrieve. Then when your child is with you, it's already part of your brain's memory and part of your habit to do so. And so you will check the backseat at the end of the trip.