When it comes to making a change in our life, such as reducing stress or losing weight, it can seem difficult. But if we broke it down into small steps that eventually turned that change into an everyday routine, it might not seem so scary. This week on “Take Care,” Dr. B.J. Fogg tells us about this new theory he calls “Tiny Habits:” a model he’s created for human behavior change, guided by research and design. Fogg is a psychologist and innovator who directs the persuasive tech lab at Stanford