Some people just ooze happiness: They always seem to be smiling and having fun, and let negative emotions and experiences roll off their backs. But if you think there’s no way you could possibly ever be that way, you’re wrong. Science proves that you do have the power to change your outlook on life. And it isn’t hard, either: Most of the tips that follow are as simple as cracking a smile once in a while (yes, that’s one of the tips). Here’s to a happier you!