If the action step you’ve identified will not complete the commitment, then you’ll need some stake in the ground to keep reminding you of actions you have pending until you have closure. You need to make a list of projects.
The purpose of the list is not to reflect your priorities but just to ensure that you’ve got placeholders for all those open loops.
Whether you draw up your “Projects” list while you’re initially processing your in-basket or after you’ve set up your action list doesn’t really matter. It just need to be done at some point, and it must be maintained, as it’s the key driver for reviewing where you are and where you want to be.