Concept
Domino Effect
The domino effect is the principle that tasks are unequal in impact, so identifying and finishing the single task that makes the others easier or unnecessary topples a chain of results far larger than the effort you spent.
The best-known productivity version of the idea comes from Gary Keller and Jay Papasan's "The ONE Thing," which builds on physicist Lorne Whitehead's 1983 demonstration that a standing domino can knock over one about one and a half times its size. Line them up, and a small push takes down something enormous. The principle is about sequence, not motivation: progress is sequential, not simultaneous. The most common mistake is flattening it into "every small step snowballs." Size isn't the point — sequence is. The second mistake is nudging nine dominoes an inch instead of pushing one all the way over. Half-finished work is expensive, because every return charges you the full cost of reloading your attention.
A real-life example
A two-person accounting-software team in Kadıköy spent every morning answering support email. For one week the founder tallied the questions: sixty percent were the same setup step. He gave a full day to writing an illustrated setup guide and finished it end to end. The next week his inbox shrank by a third, and the hours for real work appeared on their own.
How to use it
- 1Before you open anything tomorrow, list your tasks and ask of each: "If this were done, would the next three get easier or disappear?" Circle exactly one.
- 2Write your definition of "fallen" before you start — not "work on the report" but "first section drafted end to end."
- 3Book one uninterrupted 90-minute block for it with notifications off; everything else goes on a waiting list and stays there until the domino is down.