One day several years ago, I was reaching the end of my first visit with a patient, J.J., who had come to see me for anxiety and insomnia. He was a salesman for a struggling telecommunications company, and he was having trouble managing the strain on his finances and his family. He was sleeping poorly, and as soon as he opened his eyes in the early morning, the worries began. “I wake up with a list of things to worry about,” he said. “I just go through the list, and it seems to get longer every day.”