I use Agenda to take notes during customer calls and meetings. Often, during the course of a meeting, an action item comes up: follow up with customer on point ABC.
For this, I quick make a checkbox
 follow up on point ABC so I can find it later.
I don’t want the entire note to be “on the agenda”, but I sure wish just the series of check boxes could be. It’d be awfully helpful to see at a glance all the mini-tasks generated from a meeting.