Run a negotiation debrief to learn what value was left on the table

After closing, compare priorities with the other side to see the trades you both missed.

Why it works

Negotiators routinely leave joint gains unclaimed because they never learn what the other side actually valued. A structured debrief — where both sides reveal their priority rankings after the deal — makes the missed trades visible, building the skill of interest-spotting for future negotiations. The debrief itself creates no risk since the deal is already closed.

How to do it

1. After closing, ask the other party if they’d be willing to share what mattered most to them.
2. Share your own rankings openly.
3. Note any issues where the gap in priorities was large — those were potential logrolls you missed.
4. Write down one or two tactics to look for those gaps earlier next time.

Evidence

Post-deal debriefs are a teaching tool in negotiation education with practitioner support; the value comes from the learning loop rather than from studied outcome effects in the field. (anecdotal)

The debrief itself is not a studied intervention; its value is in building calibration over time, and requires that the counterpart be willing to participate honestly.

Common mistake

Treating the debrief as a chance to relitigate the deal or signal that you did better than them — which makes any future debrief impossible.