Shut off your devices periodically. In fact, shut them off often. In fact, don’t even turn them on until you are ready to work, or to answer texts or emails or social media. Put yourself in charge of when you turn on, link in, and go on line, and don’t do it any oftener than you really choose to. Remember how easily technology and social media can fit the definition of appetite—first it appeals, then it begins to control us, then it becomes an obsession, and finally an addiction.