Say “no” only when it really matters. Wear a bright red shirt with bright orange shorts? Sure. Put water in the toy tea set? Okay. Sleep with your head at the foot of the bed? Fine. Samuel Johnson said, “All severity that does not tend to increase good, or prevent evil, is idle."

Happiness comes not from having more, not from having less, but from wanting what you have.

When I thought about why I was sometimes reluctant to push myself, I realized that it was because I was afraid of failure - but in order to have more success, I needed to be willing to accept more failure.

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.

Think about what kind of person you are and shape your habits, and your happiness, to show what's true about you instead of thinking that you can just import the right answer from the outside.

Happiness can seem like an abstract, transcendent notion, but in fact, I found that getting enough sleep (very important!!), getting exercise, not letting myself get too hungry, not letting myself get too cold (I'm a person who is always cold), made a big difference. Partly because I felt happier, partly because feeling physically comfortable makes it easier to keep other difficult happiness-boosting resolutions like biting my tongue.

I've noticed that a lot of people do much better when all their resolutions are framed as 'Yes.' Not something like, "I'm going to give up French Fries," but something like "I'm going to eat three vegetables every day." "I'm going to hug more, kiss more, touch more." "I'm going to listen to more music." They do better when they frame things in the positive. And I think this is just part of human nature.