People who have at least three or four very close friendships are healthier, have higher wellbeing, and are more engaged in their jobs. But the absence of any close friendships can lead to boredom, loneliness, and depression.

When we get at least six hours of daily social time, it increases our wellbeing and minimizes stress and worry. The six hours includes time at work, at home, on the telephone, talking to friends, sending e-mail, and other communication.

Even if people just change two or three things that they are able to sustain over time, it makes quite a difference eventually.

Making better choices takes work. There is a daily give and take, but it is worth the effort.

Doing for others may be the only way to create lasting well-being.

Spending on oneself does not boost wellbeing. However, spending money on others does -- and it appears to be as important to people's happiness as the total amount of money they make.

If you want people to understand that you value their contributions and that they are important, the recognition and praise you provide must have meaning that is specific to each individual.