Contemporary research shows that happy people are more altruistic, more productive, more helpful, more likable, more creative, more resilient, more interested in others, friendlier, and healthier. Happy people make better friends, colleagues, and citizens.

Your unhappiness doesn't help anyone else - and in fact, as I mentioned in another answer, happy people are more altruistically inclined. So happiness is not a selfish goal.

I think self-knowledge is a key to happiness.We can build happy lives only on the foundation of our own natures, our own values, and our own interests.

Writing makes me happy.

The 20-minute walk I take is better than the 3-mile run I never start. Having people over for take-out is better than never having people to an elegant dinner party.

Focus not on doing less or doing more but on doing what you value.

Relationships make me happy.