Be the person who remembers the forgotten detail.

There is always a detail nobody owns: the follow-up that was implied, the person who was not told, the small thing that will cause a problem later. Remembering it costs almost nothing and prevents a disproportionate amount of trouble, and the people who do it become quietly indispensable.

When a meeting or conversation ends, spend one minute asking what has been left unhandled. Then handle it or name it. That minute is one of the highest-return habits available.