The carousel made the case: bigger decisions tempt you to deliberate longer, and they go wrong in two opposite ways that land in the same place. This is the longer version. The two failure modes, the discipline between them, and why a decision is mostly made good or bad after you make it.
Two ways to get it wrong
At this stage, decisions carry more weight. More people affected, more money at stake, consequences that reach further and are harder to undo. The natural move with a heavier decision is to think on it longer: gather more input, wait for something closer to certainty. It feels responsible.
It goes wrong in two opposite ways. The first is rushing, deciding before you've gathered what's available; you pay for it later, when the thing you skipped surfaces anyway. The second is waiting, gathering input forever as if certainty will show up if you just hold out long enough. On big decisions, it never does.
Gather, then decide
The discipline lives between the two. Gather what you can, get the input that matters, then decide. Most big decisions have a ceiling on useful information; past that point, more input just adds noise. The skill is spotting the ceiling and taking it as your cue to decide.
Deciding is an action. It's the act of cutting off more deliberation. It rarely waits for the answer to get obvious; you commit on the best information you have. And after you decide, the work changes completely. It's no longer about choosing. It's about doing: different activity, different posture.
Make the decision right
Here's the part most people miss. Most decisions turn out good or bad in hindsight, based on what happens after them. The choice sets a direction. What you do next decides whether that direction produces anything. A decent decision you commit to fully usually beats a brilliant one you only half-commit to, because full effort compounds and half effort doesn't.
Two people can make equally smart decisions and end up in completely different places years later, and the whole difference is how each one carried it afterward. Once you've decided, doubt is out of a job. Second-guessing something already in motion doesn't improve it; it drains the energy that should be making it work.
A way to run it
Think of a decision you're sitting on and name which way you're more likely to get it wrong: rushing before the input is in, or waiting for a certainty that won't come. Write the short list of input that would actually change the call, and once you have it, the gathering is over. Then pick a decision you made last quarter and split your energy since into two columns, doing it and second-guessing it. If the second column is heavy, the decision is running at half power. Close the debate.