Do one thing that challenges your mind every single day. Smile and say good morning to strangers on the street. Laugh loudly and unapologetically whenever you feel like it. When in doubt, love. We can always use more love. Allow your kids to fail. You will hate it, but it's so important. Without failure and suffering, there is no growth. No amount of money is ever worth trading for your peace of mind. Those who have it in plenty are rich beyond measure.
Every year on my birthday (January 5), I like to conduct some interesting exercise that will push me to grow in a new way. This year, I asked a number of 90-year-olds a simple question: "If you could speak your 32-year-old self, what advice would you give?"
The responses were...incredible. They range from fun, playful, and witty to deeply moving. I'd encourage you to read through them with your loved ones and reflect on those that hit you the hardest.