The moment after agreement is not the end. It is the start of what the person will remember.
Once someone chooses, the mind hunts coherence: it edits the story so the choice feels sensible, and it notices evidence that supports it. Those aftereffects persist because they protect self-image.
Post-suasion strengthens future influence by caring for that story. Reduce regret, remove competing cues, highlight the values the decision expressed, and make the first follow-through step easy.
Done well, the person doesn’t feel ‘convinced.’ They feel consistent with themselves, and they begin defending the choice in their own words. Done poorly, they feel trapped and look for an exit. The best influence leaves pride behind, because pride is adhesive.