Get a Daily Dose of Friends

Studies show that America's happiest people get at least six hours a day of interaction with friends or family. And if you proactively choose the right social network, bliss can be contagious. Harvard University research found that with each happy friend we add to our social circle, our own happiness grows by 9 percent. For each unhappy friend, our happiness declines by 7 percent. So find people you like, and commit to routines that put you in contact with them regularly.