Often, however, people are their own choice architects; they even nudge themselves. A self-nudge can be called a “snudge,” and for most of us, life can be improved via well-chosen snudges. People might limit the amount of food in their refrigerators; they put some money they don’t want to spend into a one-year certificate of deposit that has a penalty for early withdrawal; they might delete Facebook or Twitter from their smartphones; they might program their computer so that they cannot receive email during certain hours. People work
