Happiness can be fleeting. Though an event might bring great happiness, most people tend to revert to their previous level of happiness after some time, research has shown. But a new study finds a key to ongoing happiness: hang on to those good times, and don't compare your experiences to those of others.

Researchers surveyed 481 people about their happiness. Six weeks later participants identified a recent positive change in their lives that had made them happier. Six weeks after that, the psychologists evaluated whether the original happiness boost had lasted.  For some it had, but for most it had not.

“The majority got used to the change that had made them happy in the first place,” said Kennon Sheldon, professor of psychological sciences in the College of Arts and Sciences. “They stopped being happy because they kept wanting more and raising their standards, or because they stopped having fresh positive experiences of the change, for example they stopped doing fun things with their new boyfriend and started wishing he was better looking. A few were able to appreciate what they had and to keep having new experiences. In the long term, those people tended to maintain their boost, rather than falling back where they started.”

The findings are to be published in the journal Personality and Social Psychology Bulletin.

Due to genetics and other factors, individuals have a certain “set-point” of happiness they normally feel, and it can vary from somber to bubbly, the thinking goes. Sheldon’s now figures people can train themselves to stay at the top of their possible range of happiness.

“A therapist can help a person get from miserable to OK; our study shows how people can take themselves from good to great,” Sheldon said.

Sheldon also noted that the best life changes don’t necessarily equate to new purchases. Although a shiny new possession can boost happiness, that purchase has to be experienced anew every day and appreciated for what it brings to have any lasting effect on happiness.

“The problem with many purchases is that they tend to just sit there,” said Sheldon. “They don’t keep on providing varied positive experiences. Also, relying on material purchases to make us happy can lead to a faster rise in aspirations, like an addiction. Hence, many purchases tend to be only quick fixes. Our model suggests ways to reduce the ‘let down’ from those purchases. For example, if you renovate your house, enjoy it and have many happy experiences in the new environment, but don’t compare your new decor to the Joneses.’”