Approximately 50% of happiness seems to be determined by a happiness ‘set point.’
When poeple experience a lasting negative event (e.g., become paralysed) they become less happy, but after a year or so most people return to their baseline level of happiness.
The reverse is true is true when people experience a positive event (e.g., a large lottery win)
This set point may be largely determined by genetic predispositions that influence temperament and affect. For most people the set point seems to be mild positive affect (ei, not a neutral state).
Surprisingly, only about 10% of happiness seems to be determined by a person’s circumstances (e.g., culture, age, material wealth)
Approximately 40% of happiness may be determined by intentional activities (this includes the variety of things people think and do)
Behaviours, such as exercising regularly, have been found to be associated with happiness
Thoughts, such as reframing events in a positive light, are associated with happiness
Lyubormirsky et al. (2005) suggested sustainable behavioural methods for increasing happiness
The realm of intentional activity seems to be promising for increasing happiness
Volitional (self determined behaviours and thoughts that are congruent with a personal goal) activity seems best suited for increasing happiness
Activity that is based on self-congruent goals (i.e., that fit the person) seems best
Finally, because we quickly habituate to repeated activities, and these activities then loose their power to influence happiness, activities that can be varied seem best.
Fredrickson et al (2009) found that meditation led to increasing levels of positive affect over time. This may be because positive affect leads to a cycle of broadening and resource building.