Glossary
Pareto principle (80/20), explained
The Pareto principle, or 80/20 rule, is the observation that roughly 80% of results often come from 20% of the causes. It is named after Vilfredo Pareto, who noticed in the 1890s that about 80% of land in Italy was owned by 20% of the people; Joseph Juran later generalised it.
What it means
The numbers are not exact and not a law of nature. The useful idea is that effort and results are rarely proportional: a few clients, products or habits usually matter far more than the rest.
How to do it in a calendar
- In your weekly review, ask which 20% of your work produced most of last week's results.
- Give those tasks your best blocks.
- Cut, batch or delegate the rest.
An example
A freelancer finds that two clients produce most of her income. Their work goes into morning blocks; the other clients share two afternoon blocks a week.
Common mistakes
- Treating 80/20 as exact. It might be 70/30 or 90/10.
- Cutting things that support the 20%. Sleep and training are not output, but output depends on them.
Questions
Is it really always 80/20?
No. It is a rule of thumb for uneven distributions, not a fixed ratio.
Plan your week on Cutline
Free forever for planning, XP, streaks and the Arena. Reserve your @name now.