It was time to expect more of myself. Yet as I thought about happiness, I kept running up against paradoxes. I wanted to change myself but accept myself. I wanted to take myself less seriously -- and also more seriously. I wanted to use my time well, but I also wanted to wander, to play, to read at whim. I wanted to think about myself so I could forget myself. I was always on the edge of agitation; I wanted to let go of envy and anxiety about the future, yet keep my energy and ambition.

Habits are the invisible architecture of everyday life.

Sometimes, counter-intuitively, it's easier to make a major change than a minor change. When a habit is changing very gradually, we may lose interest, give way under stress, or dismiss the change as insignificant. There's an excitement and an energy that comes from a big transformation, and that helps to create a habit.

Guard your children's free time - from you.

There is a preppy wabi-sabi to soft, faded khakis and cotton shirts, but it's not nice to be surrounded by things that are worn out or stained or used up.

The belief that unhappiness is selfless and happiness is selfish is misguided. It's more selfless to act happy. It takes energy, generosity, and discipline to be unfailingly lighthearted, yet everyone takes the happy person for granted. No one is careful of his feelings or tries to keep his spirits high. He seems self-sufficient; he becomes a cushion for others. And because happiness seems unforced, that person usually gets no credit.

I spend a lot of time saying to myself, "Well, is that really what I like to do? Is that really something that makes me happy?" and letting go of the things that don't make me happy.