den01100100
One thing that I was surprised to see was the "ego depletion / willpower is like a muscle" discussion at the end. Did you encounter that a lot in your reading?
I recently saw this article: https://hbr.org/2016/11/have-we-been-thinking-about-willpowe...
In summary, they failed to reproduce a classic experiment for ego depletion, and propose some other theories. Some of the theories proposed imply that holding the _belief_ that willpower is a finite resource is self-fulfilling.
Looking on HN for "ego depletion", a number of articles have been posted regarding the reproducibility of that particular theory.
https://news.ycombinator.com/item?id=12068444 https://news.ycombinator.com/item?id=11239674 https://news.ycombinator.com/item?id=16117314
Overall, this leaves me very skeptical about any advice about what procrastination is and how to fix it.
You can buy a bass for under $100, but many of these guitars cannot be set up properly. The strings sit really high, so you need to apply a lot of pressure to play (the alternative being that they buzz against the frets).
Learning on an instrument like that adds a lot of frustration. What's worse, it can teach you a lot of bad habits, like over-gripping.