In the scope of a happy life, a messy desk or an overstuffed coat closet is a trivial thing, yet I find — and I hear from other people that they agree — that getting rid of clutter gives a disproportionate boost to happiness.

There's also something about your bed; it's sort of a symbol of yourself and of your marriage, if you're married. Making your bed doesn't seem to be an important thing in a happy life, and yet it can be that tiny foothold into a more orderly life that sometimes people need.

... one flaw throws the loveliness of [everything else] into focus. I remember reading that Shakers deliberately introduced a mistake into the things they made, to show that man shouldn't aspire to the perfection of God. Flawed can be more perfect than perfection.

Enthusiasm is more important than innate ability, it turns out, because the single more important element in developing an expertise is your willingness to practice.

The most reliable predictor of not being lonely is the amount of contact with women. Time spent with men doesn't make a difference.

In 'Before and After,' I identify the sixteen strategies that we can use to make or break our habits. Some are quite familiar, such as 'Monitoring,' 'Scheduling,' and 'Convenience.' Some took me a lot of effort to identify, such as 'Thinking,' 'Identity,' and 'Clarity.'

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