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It's often been said that a smile is contagious, and research suggests that's true. Studies suggest that friendly engagement with others boosts happiness levels, at least in part because people are more likely to treat a smiling person better than a non-smiling person.  A smiling person is more likely to be regarded as viewed as attractive, reliable, relaxed and sincere.  Cheering yourself up by cheering others is a hallmark of how to have a good life. Studies have shown that helping others has a direct correlation to individual well-being. Taking time to care for others has been a staple of understanding "the good life" throughout time. Volunteering to help others has been connected to better quality of life, including increased happiness, self-esteem, health and even longevity.  Taking time to listen to another person's problems is a great way to help others. Many times, people who are struggling simply need to be able to share their situation with a friend. By taking the time to listen, you are helping whether you can solve their situation or not. The Dalai Lama has said, “If you want others to be happy, practice compassion. If you want to be happy, practice compassion.”Putting your attention on another person, rather than yourself, is a common practice of living well with others. Most of us are taught this as children, but the idea that there are guaranteed outcomes for particular efforts or personal qualities is a sure-fire way to live in disappointment and resentment. Let it go.  Taking responsibility for your own actions is an important discipline to develop. There may be many circumstances beyond your control, but focusing on these won't help you develop the ability to make changes in your own life that may benefit you. Accept the things you can't change; change what you can. Letting go of resentments towards others is an essential part of the good life. It has been well-said that a resentment is "like taking poison, expecting the other person to die." Resentments erode the quality of your own life,...