Do you know the fundamental laws of time management?

Thierry P. Gaillard

Date: 06/01/2025

Carlson's law

Continuous work takes less time than doing it in multiple interrupted sessions.

Personal tip: fight interruptions. Batch similar tasks together.

Pareto principle

20% of efforts produce 80% of results.

Personal tip: focus on what truly matters. Save time on non-essentials.

Parkinson's law

Work expands to fill the time available for its completion.

Personal tip: set strict deadlines for each task.

Illich's law

Beyond a certain threshold (around 90 minutes), time spent ceases to be productive

Personal tip: know your limits. Take a break or switch tasks when focus drops.

Ecclesiastes' law

To everything there is a season and a time

Personal tip: focus on only one thing at a time.

Hofstadter's law

It always takes longer than you expect, even when you take into account Hofstadter's law

Personal tip: build in buffer time. Anticipate the unexpected.

Law of diminishing returns

Additional effort past a certain point yields proportionally smaller gains

Personal tip: systematically evaluate ROI on your time. Stop unproductive grind.

Laborit's law

Given multiple options, a human will instinctively choose the one requiring the least effort

Personal tip: simplify your workflows. Eliminate unnecessary friction.

Murphy's law

If there are two or more ways to do something, and one can result in a catastrophe, someone will do it that way

Personal tip: prepare fallback plans. Stress-test your systems in advance.

Peter principle

In a hierarchy, every employee tends to rise to their level of incompetence

Personal tip: play to your strengths, and delegate effectively to qualified colleagues.

Brooks's law

Adding manpower to a late project only makes it later

Personal tip: maintain strict scope control and uphold milestones across every project phase.

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