One of my key realizations about happiness, and a point oddly under-emphasized by positive psychologists, given its emphasis in popular culture, is that outer order contributes to inner calm. More than it should.

Skillful conversationalists can explore disagreements and make points in ways that feel constructive and positive rather than combative or corrective.

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.

Happiness is a critical factor for work, and work is a critical factor for happiness. In one of those life-isn't-fair results, it turns out that the happy outperform the less happy. Happy people work more hours each week - and they work more in their free time, too.

Each week, I post a video about some 'Pigeon of Discontent' raised by a reader. Because, as much as we try to find the 'Bluebird of Happiness,' we're also plagued by those small but pesky 'Pigeons of Discontent.'

Whenever I start a new book, I think, 'This is the most interesting subject of all time. It's sad, I'll never enjoy writing another book as much as I enjoy this one.' Every time, I'm convinced. And then I change my mind when I start the next book.

One of the best ways to make yourself happy in the present is to recall happy times from the past. Photos are a great memory-prompt, and because we tend to take photos of happy occasions, they weight our memories to the good.

Turn off your email; turn off your phone; disconnect from the Internet; figure out a way to set limits so you can concentrate when you need to, and disengage when you need to. Technology is a good servant but a bad master.

People are powerfully moved by imagination, belief, and knowledge. They can consider the past and future. They can make changes in their behavior out of reason in a way that animals can't do.

Nature is impersonal, awe-inspiring, elegant, eternal. It's geometrically perfect. It's tiny and gigantic. You can travel far to be in a beautiful natural setting, or you can observe it in your backyard - or, in my case, in the trees lining New York City sidewalks, or in the clouds above skyscrapers.

Work done by other people sounds easy. How hard can it be to take care of a newborn who sleeps 20 hours a day? How hard can it be to keep track of your billable hours? To travel for one night for business? To get a 4-year-old ready for school? To return a few phone calls? To load the dishwasher? To fill out some forms?

Growing up in Kansas City, I was always neat, the teacher's pet, know-it-all type.

They say that people teach what they need to learn. By adopting the role of happiness teacher, if only for myself, I was trying to find the method to conquer my particular faults and limitations.

Like most people, I have several pet subjects - that may or may not be interesting to other people. Don't get me started on happiness, or habits, or children's literature, or Winston Churchill, unless you really want to talk about it.

Enthusiasm is a form of social courage.

'Potato-chip news' is news that's repetitive, requires little effort to absorb, and is consumable in massive quantities: true crime, natural disasters, political punditry, celebrity gossip, sports gossip, or endless photographs of beautiful houses, food, or clothes.

Negative emotions like loneliness, envy, and guilt have an important role to play in a happy life; they're big, flashing signs that something needs to change.