This is after all mirrored in psychological literature in the models of willpower as a finite or an infinite resource.
Although the simple "I decide I won't have akrasia, so I won't" is doomed to fail, the meta-focus is interesting and likely to be productive:
What would it take to be a disciplined person?
Which transformation in my environment can I enact so that I become more disciplined?
How can I construct a positive feedback loop of acting on my decisions?
And so on...
I've recently been extracting extraordinary value from the Jocko Podcast.
Jocko Willink is a retired Navy SEAL commander, jiu-jitsu black belt, management consultant and, in my opinion, master rationalist. His podcast typically consists of detailed analysis of some book on military history or strategy followed by a hands-on Q&A session. Last week's episode (#38) was particularly good and if you want to just dive in, I would start there.
As a sales pitch, I'll briefly describe some of his recurring talking points:
The Q&A sessions, in which he answers questions asked by his fans on Twitter, tend to be very valuable. It's one thing to read the bullet points above, nod your head and say, "That sounds good." It's another to have Jocko walk through the tactical implementation of this ideas in a wide variety of daily situations, ranging from parenting difficulties to office misunderstandings.
For a taste of Jocko, maybe start with his appearance on the Tim Ferriss podcast or the Sam Harris podcast.