I feare not! Ye shalle need venture to the nearest library of arcane magicks and occultisms to find this olde tome, it be not available on the inter-nets... (Barnes and Nobles wille suffice.)
I came across it in 'True Magick' by Amber K. (the newer, expanded edition.) I'm looking at it here and the section written is actually lacks pretty badly for context... so it would require a many many pages to really include it for you guys. The specific paragraph of the exercise:
Start by watching your words. When you say you will do something, do it, immediately, if possible. Set a small goal and accomplish it quickly and decisively. Then congratulate yourself, and consider how it felt to do that. Set yourself another goal, a bit more challenging. Gather your energy and do it as quickly as possible. Keep stretching and challenging yourself, one task at a time, one day at a time; your will is a muscle that must be exercised to grow strong.
I guess I fleshed it out based on my understanding of the rest of the book... Did you give it a try, RubberDucky?
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I could totally eat that cookie.*Eats cookie.*