What are you thankful for?
The Science of Happiness - An Experiment in Gratitude
Gratitude as a motivator
Gratitude may also serve to reinforce future pro social behavior in benefactors. For example, one experiment found that customers of a jewelry store who were called and thanked showed a subsequent 70% increase in purchases. In comparison, customers who were thanked and told about a sale showed only a 30% increase in purchases, and customers who were not called at all did not show an increase. In another study, regular patrons of a restaurant gave bigger tips when servers wrote "Thank you" on their checks.
A large body of recent work has suggested that people who are more grateful have higher levels of subjective well-being. Grateful people are happier, less depressed, less stressed, and more satisfied with their lives and social relationships. Grateful people also have higher levels of control of their environments, personal growth, purpose in life, and self acceptance. Grateful people have more positive ways of coping with the difficulties they experience in life, being more likely to seek support from other people, reinterpret and grow from the experience, and spend more time planning how to deal with the problem. Grateful people also have less negative coping strategies, being less likely to try to avoid the problem, deny there is a problem, blame themselves, or cope through substance use. Grateful people sleep better, and this seems to be because they think less negative and more positive thoughts just before going to sleep.