Celebrate strengths

... even if it's stressful. Mastering a new skill means more stress now but more happiness later.

The key is to choose the right new skill to master, a challenge to undertake, or an opportunity to get out of your comfort zone. The greatest increases in happiness come from learning...

Intangible experiences, relationships, and communication have greater benefits than possessions, things and money.

Studies analyzing if we get more happiness for our buck by paying for therapy or by receiving cash in hand found that therapy is 32 times more effective than money.

Prepare for the worst; hope for the best.

There's actually a lot of peace of mind to be gained in thinking carefully and in detail and consciously about how badly things could go. You might actually find that your fears were exaggerated.

Overworked and overburdened is a recipe for unhappiness. So if you want to be happy, get some quick wins by saying no.

But say no the right way: say "I don't." Using the phrase "I don't" is more effective than saying "I can't." 

Just for a day or two, not forever.

It's about self-control and willpower:  Exerting self-control leads to more self-control over time. Plus, denying yourself something makes you appreciate the things you take for granted.

Geographically close friends (and neighbors) have the greatest effect on happiness.

Individual happiness cascades through groups of people, like contagion. So make friends with people who live near you.