[soora]

One concept that I think is hard to grasp, and makes taking this sort of advice hard to apply, is just how much our default happiness is biologically hard coded.

For this reason I view the point about exercise and eating healthy to be the most important one on the list.

[Amokrane]

I have read a book on this subject: http://www.amazon.fr/The-How-Happiness-Approach-Getting/dp/0.... The author wrote that happiness was defined at 50% by our genes, 10% by circumstances and 40% by intentional activities. I guess that's a non-negligible proportion we could act on.