What does it mean that track your predictions?

Recording what you expect to happen and comparing to what actually happens is the only reliable method for calibrating judgment. Without a written record, hindsight bias rewrites your memory of what you believed, making genuine learning from experience impossible.

Example: A product manager believes her company will close a major enterprise deal within six weeks. She is 85% confident. Rather than holding this prediction in her head, she opens her prediction journal and writes: "2026-02-22 — Enterprise deal with Acme Corp closes by April 5. Confidence: 85%. Reasoning: Champion is enthusiastic, budget is approved, legal review is underway. Key risk: Their CTO has not signed off." Eight weeks later, the deal closes — two weeks late, after the CTO demanded a security audit that delayed the contract. She scores the prediction: the event happened, but outside her timeframe. Her 85% confidence was overconfident given that she had flagged but underweighted the CTO risk. She adjusts: in future deals, unresolved executive stakeholder concerns get a 15-point confidence reduction. Without the journal entry, she would have remembered herself as having predicted the deal would close — which it did — and learned nothing about her systematic underweighting of stakeholder risk. The record made the miscalibration visible. Visibility made correction possible.

Try this: Start a prediction journal today. Write down five predictions about events that will resolve within the next 30 days. For each prediction, record: (1) the specific outcome you expect, stated precisely enough that resolution is unambiguous, (2) your confidence level as a percentage, (3) three sentences explaining your reasoning, and (4) the date by which the prediction should resolve. Use any format — a notebook, a spreadsheet, a notes app. The format does not matter. What matters is that the record exists outside your head, with a timestamp that prevents retroactive editing. Set a calendar reminder 30 days from now to score each prediction: did the outcome occur? How did your confidence level compare to reality? Where were you most and least calibrated? This is the beginning of a feedback loop between your expectations and the world.