Richard Koch — Revisiting the 80/20 Principle, The Power of Optimistic Journaling, Studying History to Improve Investing, and The Grand Beliefs of Winners (Plus: The Toxic Beliefs of Losers) (#680) - The Blog of Author Tim Ferriss

Interview with Richard Koch on The Tim Ferriss Show podcast

The 80/20 Principle, Achieving Unreasonable Success, and More

Richard Koch: books, biography, latest update

The 80/20 Principle and 92 Other Powerful by Koch, Richard

Colleen Fuller posted on LinkedIn

Richard Koch — Revisiting the 80/20 Principle And Much More

THE 80/20 PRINCIPLE by Richard Koch

Richard Koch: books, biography, latest update

How to Get 10X Results With Less Effort｜Richard Koch

Richard Koch — Revisiting the 80/20 Principle, The Power of

Richard Koch — Revisiting the 80/20 Principle, The Power of

Timothy Ferriss's Blog, page 3

Richard Koch — Revisiting the 80/20 Principle, The Power of