10. Take action. Some people assume happiness is mostly a matter of inborn temperament: You’re born an Eeyore or a Tigger, and that’s that. Although it’s true that genetics play a big role, about 40 percent of your happiness level is within your control. Taking time to reflect, and making conscious steps to make your life happier, really does work. So use these tips to start your own Happiness Project. I promise it won’t take you a whole year.