I thought I could find it in the military, I was wrong.
I thought leaving the military and subjecting myself to the cold reality of the free market would force me to develop it. I was wrong.
I thought starting a company would make me focus. I was wrong.
Finally, with no other options left, I entered corporate America. Having a large, nasty ongoing project, clear motivation to keep working on it, and the latitude to implement my own approach was all I needed to start making real progress on my own inner quest for productivity.
In retrospect, it was not the last thing that I did that finally "did the trick." It was the combination of everything I'd done. There weren't any magic tricks, no way to skip the years of paying dues. There's no way to force it, even if you throw yourself into the ultimate sink-or-swim environment, if you aren't ready for that particular experience, you'll either sink, or you'll swim, but find that swimming doesn't mean what you think it means.
Your current course of action will not have the intended result. What will happen is that you'll get burned out. Then you'll have nothing to show for it but the experience. You'll take that experience to your next big push and build on it. And so on and so forth.
At some point, all of that accumulated experience will drive out some small success. Might take three years, probably will be closer to 8-10. Then the game will change, you'll have mastered productivity and now you're playing a management game rather than a survival one.
You're lucky in that you're driven to make this transition, most career techs aren't, they stay at the level of survival their entire lives.