Only about 40 percent of our happiness is predetermined by our genes, and as little as 10 percent by our circumstances — which adds up to a lot of opportunity to shape our mental health, says Yale psychology professor Laurie Santos, PhD. On this episode, the woman behind the viral “Science of Well-Being” class, which guides people through research-backed ways to improve happiness, gives a crash course on why our tech habits are chipping away at our contentment, how a “boring” routine and meditation can improve our default mindset, and what we can do each night to set ourselves up for a lifetime of joy. It’s a timeless episode, but also one that couldn’t come at a better time.

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