Happiness Based On Your Personality Type with Gretchen Rubin
Erika Taught Me
00:00
The Gretchen Rubin Business Model
You have to be kind of a good marketer to become a best-selling author in this day and age, says Gretchen Rubin. "I feel like the world is my research assistant," she adds. She also has an app called Happier that tries to help you use the power of knowing your four tendencies to help you stick to your habits.
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