“Get a recordable button with at least thirty seconds of recordable space (you can purchase inexpensive ones online). Find a time when you’re alone and calm. Then, in your regulated, soothing voice, record a message for your child about bedtime. It might be a verse from a bedtime song, it might be the mantra your child uses, it might be a message about seeing you in the morning—whatever your child would find soothing in your absence. Integrate this button in the sleep routine; your child might press the button once to hear your message while you’re in the room, once while you walk out, twice when you’re outside the door. Or you can even strike a “bargain”: “Let’s work on using the comfort button—I want to hear you listen to four full rounds before you call for me. I’ll know you’re using it because I’ll be waiting outside your door. If things still feel bad, call for me and I’ll come in and rub your back and tell you you’re safe and we’ll try it all again.”