When Professor Laurie Santos first offered a course about psychology and happiness at Yale University, over a thousand students signed up. This week on NEXT, Santos gives us tips  on how we can be happier in our lives. Plus, we’ll hear dream experts discuss the evolution of COVID-19 dreams. And we talk to author, illustrator and TV writer Jonny Sun about his relationship with work and free time — and the things he’s unintentionally inherited from his family.