If breaking bad habits was easy, none of us would have them. As an associate professor in medicine and psychiatry at UMass Medical School, Dr. Judson Brewer has spent more than 20 years researching addiction. He joins us to talk about how we can regain control of our impulses, which he writes about in “The Craving Mind: From Cigarettes to Smartphones to Love – Why We Get Hooked and How We Can Break Bad Habits” (Yale University Press).