The 80/20 Rule, also known as the Pareto Principle, states that roughly 80% of outcomes come from 20% of causes.

Key Concepts:
The Origin: It was named after Italian economist Vilfredo Pareto, who noticed that 80% of the land in Italy was owned by 20% of the population.

Business: 80% of your profits often come from 20% of your customers.

Productivity: 20% of your tasks usually account for 80% of your total results.

Life: We wear 20% of our clothes 80% of the time.

The Main Lesson:
It is not about working harder, but about identifying the most effective 20% of your efforts and focusing your energy there to maximize impact.

Focus on the vital few, ignore the trivial many.