For fans of Thinking, Fast and Slow and The Power of Habit, a groundbreaking new study of how disrupting our well-worn routines, both good and bad, can rejuvenate our days and reset our brains to allow us to live happier and more fulfilling lives.

Have you ever noticed that what is thrilling on Monday tends to become boring on Friday? Even exciting relationships, stimulating jobs, and breathtaking works of art lose their sparkle after a while. People stop noticing what is most wonderful in th...