I watched a very interesting TED talk (13 mins) with Robert Waldinger, who is the director of the Harvard Study of Adult Development.
What if we could study people from the time that they were teenagers, all the way into old age, to see what really keeps people happy and healthy? We did that.
For 75 years the researchers followed the lives of 724 men to track what factors affected happiness and health. Around 60 of them are still alive today, participating in the study.
Surprisingly, there was only one clear conclusion from this remarkable study: For living a happy life, the most important thing is having good, close relationships. It makes you happier, and it makes you live longer. It even lessens the risk of memory problems at old age.
So there you have it :) Invest more time in relationships with friends, family, community, your significant other, if you want to be happy and healthy.