The answers are pretty simple. It's making them habits that's hard.
Here's the shortlist, but it's really his delivery and the details he provides that make it all sound so simple.
- Accept painful emotions as a part of life.
- Spend more uninterrupted, non-multitasked time with people who love and support you.
- Exercise.
- Cultivate gratitude.
- Simplify.
I specifically like the emphasis on how #4 needs to be ritualized and not just "understood" in the abstract. I grew up in a religious family and am a "more spiritual than religious" adult. The loss of prayer is, even from an agnostic's perspective, a real loss in the sense that it deprives a person of a regular engagement in reflecting on things to be grateful for.