I'm not particularly asking for help on the productivity thing.

Why not? Isn't this topic deeply related to overcoming bias? To me, they are all part of the same striving for self-improvement. Improving my ability to work and not be distracted is a way to be a more effective human (better at achieving my goals), just like improving my ability to accurately judge the truth and not be biased.

While it doesn't have much recursive loop potential, an improvement in personal productivity is a meta-level improvement - it improves our general ability to create stuff / advance science. Advancements in this area have a leveraged effect in that they could potentially cause lots of people to accomplish lots more.

So I think it's really important, and I wish we talked about it more here. Among other things, it seems to affect some of the smartest people, so I see potentially huge gains from getting better at it. David Allen has done far more to make people more effective than this blog has.