Ten Tips for Being Happier.

2. Do let the sun go down on anger.

I had always scrupulously aired every irritation as soon as possible, to make sure I vented all bad feelings before bedtime. Studies show, however, that the notion of anger catharsis is poppycock. Expressing anger related to minor, fleeting annoyances just amplifies bad feelings, while not expressing anger often allows it to dissipate.

3. Fake it till you feel it.
Feelings follow actions. If I’m feeling low, I deliberately act cheery, and I find myself actually feeling happier. If I’m feeling angry at someone, I do something thoughtful for her and my feelings toward her soften. This strategy is uncannily effective.

4. Realize that anything worth doing is worth doing badly.
Challenge and novelty are key elements of happiness. The brain is stimulated by surprise, and successfully dealing with an unexpected situation gives a powerful sense of satisfaction. People who do new things — learn a game, travel to unfamiliar places — are happier than people who stick to familiar activities that they already do well. I often remind myself to “Enjoy the fun of failure” and tackle some daunting goal. The Happiness Project Tips: Ten tips for being happier.

Thanks to Anon 3:20's comment on Spanking away depression