Notes on The 80/20 Principle

By Richard Koch

What is the 80/20 Principle?

Thinking 80/20

80/20 in Happiness

80/20 in Investing

80/20 in Relationships

80/20 at Work

80/20 in Winning

80/20 Time Management

80/20 in Business

“Most decisions should probably be made with somewhere around 70% of the information you wish you had. If you wait for 90%, in most cases, you’re probably being slow.” — Jeff Bezos

80/20 in Project Management

80/20 in Negotiation



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Aidan Hornsby

Aidan Hornsby


Founder of DoubleUp (, co-founder of Supercast ( Admirer of simplicity, fan of excess. Sharing notes at