4. Develop a more positive mindset

When researchers worked with highly stressed health care workers to improve their outlook, they found that after 12 weeks the workers reported they were happier and more satisfied with their lives.

Part of the intervention included work on gratitude and forgiveness. For instance, you can keep a gratitude journal, jotting down specific things you're grateful for. Instead of rushing to hurt or anger when someone behaves thoughtlessly toward you, choose forgiveness. As you practice these traits, you may find your happiness level increasing too.

Ready to focus on improving your happiness? There may be an even bigger payoff for you. Research has shown that when people focused more on kindness and other good works, they not only felt happier but also developed a stronger ability to fight off disease. Now that's a win-win.