The Tiny Decisions Momentum System
Replace big plans with small, reversible decisions that compound into progress
Big decisions are hard to make, hard to change, and almost always wrong. Once ego and pride are invested, you stop being objective and the desire to save face overrides the desire to make the right call. This framework replaces the illusion of grand planning with a system of small, reversible choices that build momentum through visible progress.
The system starts with a fundamental insight: humans are terrible estimators. We consistently underestimate by factors of two or more. A project you estimate at six months will likely take a year. The solution is not to estimate better but to estimate smaller. Break a twelve-week project into twelve one-week projects. Break thirty-hour tasks into six-to-ten-hour chunks. The smaller the unit, the less wrong your estimate will be.
The same principle applies to to-do lists. Long lists collect dust because each completed item feels like an insignificant fraction of the whole. Break a hundred-item list into ten lists of ten. Now each completed item represents ten percent of its list, which feels meaningful. Prioritize visually by putting the most important thing at the top. When that is done, the next item becomes the most important. You always have exactly one next thing to do.
The compounding effect is psychological as much as practical. Momentum fuels motivation. Each small win gives you energy for the next. Each completed decision is a brick in your foundation. You cannot build on 'we will decide later,' but you can build on 'done.'
- Big decisions are hard to make, hard to change, and invite ego to override objectivity
- Small decisions are effectively temporary because the cost of changing them is low
- Humans are terrible estimators; make your estimation units smaller to reduce error
- Long lists do not get done; break them into many short lists
- Momentum fuels motivation; quick wins keep you going
- Making the call is making progress; swap 'let us think about it' for 'let us decide on it'
- Break the project into one-week chunksTake your entire project scope and divide it into pieces that can each be completed within a single week. If any chunk feels larger than a week, break it down further. The goal is that every Monday you can define what 'done' looks like by Friday.
- Shrink your to-do list into micro-listsTake any list longer than ten items and split it into multiple lists of five to ten items each. Prioritize each list visually with the most important item at the top. Work top-down. When you complete the top item, the next one automatically becomes your single priority.
- Make decisions immediately instead of deferringWhen a decision point arises, commit to a choice right now. You are as likely to make a great call today as tomorrow. If the decision turns out wrong, you can correct it later. The cost of a wrong small decision is far less than the cost of no decision at all.
- Celebrate and ship each small completionEvery completed chunk should be visible to the team and ideally to customers. Announce progress every one to two weeks. Let people use, taste, or play with what you have built so far. This generates feedback, energy, and excitement.
During his solo North Pole expedition consisting of thirty-one consecutive marathons over seventy-two days alone, the enormity of the overall goal was so overwhelming that Saunders rarely thought about it. His decision-making horizon extended only to reaching the next visible patch of ice a few yards ahead.
The team avoided building an affiliate program for years because the ideal solution seemed impossibly complex: automated payments, international tax compliance, mailed checks. They finally asked what they could do easily right now that would be good enough. The answer: pay affiliates in store credit instead of cash.
The authors drew this insight from observing the gap between ambitious planning and actual execution, both in their own projects and in spectacular public failures like Boston's Big Dig (five years late, billions over budget) and Denver International Airport (sixteen months late, two billion dollars over budget). They also found inspiration in polar explorer Ben Saunders, who completed thirty-one consecutive marathons solo by making his moment-to-moment decisions about nothing grander than reaching the next visible patch of ice a few yards ahead.