In western culture (particularly) I think we make two mistakes that are much more fundamental than the sins contained in this article. Happiness is subjective, so while I agree that one must have a working definition for it, I would say its more important to understand the mechanics of it first. Happiness is also experiential and registers internally within oneself. Sure events can bring us joy and add to ones happiness however purely attaching ones happiness to external events or activities seems incoherent to me. When one is at peace within themselves, on a fundamental level one could relate to that as a deeper form of happiness. Thus when a challenging activity/event occurs one can still be happy and be more open to the learning behind every challenge we face. The second fundamental mistake is we are socialised to believe that happiness is something we have to seek out, which implies one isn't be happy now. Being an experience, happiness can only occur in the present moment and given that our culture aligns happiness with success in the areas of owning a home, having a family and children, being financially secure with stable health and well being which all generally occur around the age of 40yrs, we are left wondering why we still aren't happy after achieving these goals. Why? we have fundamentally trained our subconscious minds to relate to happiness as a future based concept and as we all know, we can't experience anything tomorrow or yesterday.