“Our minds, cobbled together over millenniums by that lazy craftsman, evolution, are riddled with bad mental habits. We routinely procrastinate, make poor investments, waste time, fumble important decisions, avoid problems and rationalize our unproductive behaviors, like checking Facebook instead of working. These ‘‘cognitive errors’’ ripple through our lives, CFAR argues, and underpin much of our modern malaise: Because we waste time on Facebook, we end up feeling harried; when we want to eat better or get to the gym more, we don’t, but then feel frustrated and guilty.”