Read about it in a brief post I just put up at GNXP.com. The interesting thing is that in delaying gratification, and so increasing our future material welfare, we end up decreasing our hedonic well-being. The two are outta whack, probably because genes for delaying gratification have only become common within the past several hundred years.
I've never had the problem of planning too much for the future -- strikes me as bizarre. I'm smart and hard-working enough to get stuff done, I'm not drowning in debt, and I don't splurge a lot. But I'm still incredibly impulsive and novelty-seeking -- as you can probably tell from how often and how widely my focus changes in writing these things.
Motivated more by avoidance of future regret than of present guilt, I've led a pretty satisfying life so far, on reflection. Had I done the prudent thing, I never would have lived in Barcelona -- twice -- leaving only when I was broke. I would have gone straight to grad school in linguistics and would be further along in "establishing my career," rather than wander the academic world in search of a greater rush. And I would never have encouraged my tutorees when they aggressively flirted with me.