[gk101]

The author gave a TED talk about this here: https://www.youtube.com/watch?v=Qy5A8dVYU3k

and yes, the default mode of the mind is to wander: http://en.wikipedia.org/wiki/Default_mode_network

[andy_ppp]

Interesting video but the dodgy scale on his graph to make the difference between the happiness in the Mind Wondering and Focused states seem larger than it is.

The difference is about 10%, it might be a very solid 10% more happy, but god, scratching my back can make me 10% more happy :-D