Claudia Dreyfus has a fantastic interview of Daniel Gilbert, author of Stumbling on Happiness:
Q. How does [your research] relate to understanding happiness?
A. Because if we can’t predict how we’d react in the future, we can’t set realistic goals for ourselves or figure out how to reach to them.
What we’ve been seeing in my lab, over and over again, is that people have an inability to predict what will make us happy — or unhappy. If you can’t tell which futures are better than others, it’s hard to find happiness. The truth is, bad things don’t affect us as profoundly as we expect them to. That’s true of good things, too. We adapt very quickly to either.
So the good news is that going blind is not going to make you as unhappy as you think it will. The bad news is that winning the lottery will not make you as happy as you expect.
Q. Are you saying that people are happy with whatever cards are dealt to them?
A. As a species, we tend to be moderately happy with whatever we get. If you take a scale that goes from zero to 100, people, generally, report their happiness at about 75. We keep trying to get to 100. Sometimes, we get there. But we don’t stay long.
We certainly fear the things that would get us down to 20 or 10 — the death of a loved one, the end of a relationship, a serious challenge to our health. But when those things happen, most of us will return to our emotional baselines more quickly than we’d predict. Humans are wildly resilient.
Here's a crucial section:
Q. As the author of a best seller about happiness, do you have any advice on how people can achieve it?
A. I’m not Dr. Phil.
We know that the best predictor of human happiness is human relationships and the amount of time that people spend with family and friends.
We know that it’s significantly more important than money and somewhat more important than health. That’s what the data shows. The interesting thing is that people will sacrifice social relationships to get other things that won’t make them as happy — money. That’s what I mean when I say people should do “wise shopping” for happiness.
Another thing we know from studies is that people tend to take more pleasure in experiences than in things. So if you have “x” amount of dollars to spend on a vacation or a good meal or movies, it will get you more happiness than a durable good or an object. One reason for this is that experiences tend to be shared with other people and objects usually aren’t.