Let’s close the loop on this. — Let us finish it and confirm that it is finished.
Check the box. Cross it off the list. — The task is done, and the list shows it.
What are the next steps? Who owns this? — The questions at the end of a meeting.
Let’s wrap up. Tie up loose ends. — Finish what is still open.
Get it over the finish line. — Complete it, even if the last part is hard.
One more thing off my plate. — One less open task.