And, if I may: what does 7% happier, 20% increase in life satisfaction exactly mean anyway? My 5% might be or feel very different than someone else's.

See, I have a hard time with all this self-help stuff. What's so difficult about it that needs hundreds of books and blogs to be expounded?

You either want to do something or you don't. Be grateful for what you have and try to improve a little at a time. Remember that everyone is out to get money from you. Try really hard not to be an asshole.

Seems like common sense to me, and everything else feels like a lot of unnecessary junk.