
Look at the image: one heavy black domino gets hit, then a clean row of lighter dominos lines up behind it. That first upright domino is your first‑order effect. Everything after that gets fuzzier, weaker, and more unpredictable. Build your plan around that first hit, not the fifth wobble.
Before any project, ask: what is the bold black domino here? For a launch, it might be getting 100 people to genuinely try the product, not predicting what their friends’ friends will think. Design your actions to guarantee that first effect, then let the later dominos fall how they fall.
Amazon obsessed over fast, reliable delivery as the first‑order effect, trusting that word‑of‑mouth and loyalty would follow.
Basecamp focused on making project setup absurdly simple, knowing that more teams and upgrades would be downstream effects.