One reason that challenge brings happiness is that it allows you to expand your self - definition. You become larger. Suddenly you can do yoga or make homemade beer or speak a decent amount of Spanish. Research shows that the more elements make up your identity, the less threatening it is when any one element is threatened.

I've found that I snack less and concentrate better when I chew on a plastic stirrer - the kind that you get to stir your to-go coffee. I picked up this habit from my husband, who loves to chew on things. His favorite chew-toy is a plastic pen top, and gnawed pen tops and little bits of plastic litter our apartment.

A book is a better way to develop a complicated idea, or to tell a big story and to show how ideas weave in and out of each other, which is something that comes up a lot in happiness because all these ideas are interconnected.

Money. It's a good servant but a bad master.

Superstition is the irrational belief that an object or behavior has the power to influence an outcome, when there's no logical connection between them. Most of us aren't superstitious - but most of us are a 'littlestitious.'

Pouring out ideas is better for creativity than doling them out by the teaspoon.

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