Daniel Amen's 18-40-60 Rule to Happiness

When you’re 18, you worry about what everybody is thinking of you; when you’re 40, you don’t give a darn what anybody thinks of you; when you’re 60, you realize nobody’s been thinking about you at all. People spend their days worrying and thinking about themselves, not you.

Reduce worry, anxiety, and negativity and increase self-esteem, joy, and overall happiness.