It may sound corny, but the research clearly demonstrates that you would be happier if you cultivated an “attitude of gratitude.” Gratitude helps us thwart hedonic adaptation. Hedonic adaptation is illustrated by our remarkable capacity rapidly to adjust to any new circumstance or event. This is extremely adaptive when the new event is unpleasant, but not when a new event is positive. So, when you gain something good in your life – a romantic partner, a genial officemate, recovery from illness, a brand-new car – there is an immediate boost in happiness and contentment. Unfortunately, because of hedonic adaptation, that boost is usually short-lived. As I’ve argued, adaptation to all things positive is essentially the enemy of happiness, and one of the keys to becoming happier lies in combating its effects, which gratitude does quite nicely. By preventing people from taking the good things in their lives for granted – from adapting to their positive life circumstances – the practice of gratitude can directly counteract the effects of hedonic adaptation.

Sonja Lyubomirsky, The How of Happiness