The 80/20 principle describes how 80% of results can emanate from 20% of core activities.
It’s a lens and a useful one at times to consider.
Keller, author of 'The One Thing' says we can take it further than that:
“Keep going. You can actually take 20 percent of the 20 percent of the 20 percent and continue until you get to the single most important thing! No matter the task, mission, or goal. Big or small. Start with as large a list as you want, but develop the mindset that you will whittle your way from there to the critical few and not stop until you end with the essential ONE. The imperative ONE. The ONE Thing.”
Let’s say your 80/20 is to read a particularly book that you have carefully selected.
The 80/20 to that could be to take the time to read the book cover to cover without interruptions during optimal times when you are alert and undistracted.
The 80/20 of the 80/20 may be to read the first paragraph and last paragraph of the first and last page of each chapter.
The 80/20 of the 80/20 of the 80/20 may be to read the first page of the book and the last page.
Will take some trial and error, testing, focus and reflection.
Point being. Get really good at identifying what’s important to you + chunk it down and have laser like focus on it.