Sometimes when I’m facing a horrendous week or am upset over a perceived slight, I remind myself that I won’t remember it (much less care about it) one month, six months, or a year from now. (The more extreme version of this strategy is to use the deathbed criterion: Will it matter when you’re on your deathbed?)

We found that the happiest people take pleasure in other people’s successes and show concern in the face of others’ failures. A completely different portrait, however, has emerged of a typical unhappy person—namely, as someone who is deflated rather than delighted about his peers’ accomplishments and triumphs and who is relieved rather than sympathetic in the face of his peers’ failures and undoings.

Last but not least, the happiest people do have their share of stresses, crises, and even tragedies. They may become just as distressed and emotional in such circumstances as you or I, but their secret weapon is the poise and strength they show in coping in the face of challenge.

Happiness is not out there for us to find. The reason that it's not out there is that it's inside us.

If you're not happy today, then you won't be happy tomorrow unless you take things into your own hands and take action.