The Happiness Lab with Dr. Laurie Santos How to Break Up with Your Bad Habits
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Apr 13, 2026 
Wendy Wood, a USC psychologist and habit researcher, dives into why bad routines cling so tightly. She explores how context and automatic cues shape behavior. A striking Vietnam heroin story challenges what we think about addiction. There’s also a look at making good routines easier and bad ones harder through simple environmental tweaks.
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Richard Ratner Faced a Heroin Crisis in Vietnam
- In Vietnam, Richard Ratner detoxed young soldiers addicted to heroin while fearing they would return home and relapse.
- Bored troops used potent, easily available heroin in the barracks, and the Army responded with amnesty and cold-turkey detox.
Willpower Fails Where Automatic Habits Win
- Lasting behavior change relies less on willpower than on making desired actions easy enough to repeat until they become automatic.
- Wendy Wood says willpower keeps the forbidden behavior mentally active, while successful people redesign situations so healthy choices run on autopilot.
How Rewards Turn Routines Into Mental Shortcuts
- Habits form when a repeated routine reliably delivers a reward, letting the brain chunk many actions into one automatic sequence.
- Wendy Wood uses coffee making and driving to show the sensory-motor system can run complex behaviors without conscious thought.
