Happiness can't be measured, only felt. One of the many problems with our supposedly scientific culture is that it has inculcated the belief that hitting the sweetspot on the achievement curve = happiness (whatever that is). Now, we all know this, whether through epigrams, ancient wisdom, anecdotes, simple common sense, or Instagram. But confronting it as it pertains to our individual perfect, blessed lives is a different kettle of fish altogether. For my part, I find the notion of "volunteering" in order to appear more attractive to a hiring board to be poisonous. Possibly whatever is just a bit worse than that. Horrifying? It cheapens the act of volunteering (everyone else takes a step back, and I guess you've volunteered), but more to the point, it cheapens the volunteer. Imagine the world we're building with this sort of (expurgated). Wherein no one ever does or says anything that isn't in their own direct self-interest. Human kindness, the ineffable link between sentient creatures, our (in my view, insane, but nevertheless beautiful) yearning for the divine? All of these things become just another way of talking about numbers, abstractions of being alive, rather than the fact of the same.
Nope, nope, nope. I opt out, and you should, too. Er, IMHO.