https://www.amazon.com/Willpower-Rediscovering-Greatest-Human-Strength/dp/0143122231
Trying to find the will to read this again, and finish it this time. Here is the summary: willpower = glucose levels in the brain. Before doing something mentally taxing, drink some lemonade.
I bought it for kindle and regret it. I need spatial, tangible locations and progress through a book.