If I agree with the above, I can set aside the quest for ultimate measurement of absolute happiness (e.g. Solon's "Count no man happy until he be dead."[2]) . However, I can still do things that affect relative happiness. When I stopped consulting for boring ERP software, my quality-of-life definitely improved. Again, I won't know if I'm ultimately "happy" until I'm lying on my deathbed. Nevertheless, it feels like I got a little victory from changes like that.
[1]http://www.amazon.com/Stumbling-Happiness-Daniel-Gilbert/dp/...
Science has consistently shown that good health and relationships correlate to happiness. It has even been shown that there is a causal effect (ie, if you start exercising you start feeling better).
Someone unaware of that fact may read a post like this and decide to exercise for 30 mins everyday.
The science of happiness (not their philosophy) is new and it is in a prehistoric stage. Think about the history of chemistry and the alchemist adventures!
The post doesn't invalidate your opinion, just reading and article doesn't make you happy except for a few enlightened ones. But, knowing the correlation using a lot of data can help you in this search.
Sure, it's possible that many of them suggest approaches to 'happiness' that do not apply to me, but I really don't know because I never took the time to actually spend, say, 30 days committing to their advice. And my impression is that this seems to be the case for most people who bother with 'self-improvement'.
(That said, I'm not disagreeing with you. Finding what makes specifically you happy is important.)
I've read books about it too, and not been helped that much beyond perhaps gaining some insight, or setting expectations of what happiness is like. But that doesn't invalidate the information in the books, it tells you that merely reading about happiness does not make it so. You can read all the books about how to be a great basketball player, but you won't improve until you actually get on a court and shoot some shots.
Citation needed. Preferably not a citation that can be countered by another, opposite, citation.