Having some sort of visual indicator of the action items, along with the people responsible for them, always helps the team stay focused.
The most important thing is never to forget to appreciate and thank your team members for the ways they have helped each other.
With a secret box, team members can drop in their views and submit things they would want to discuss in the retrospective.
This retrospective exercise can be used within agile frameworks like Scrum, SAFe, XP or Kanban to have teams agree upon the vital few improvement actions that they will do.
The Perfection Game can be used as a retrospective exercise to quickly discover strengths and define effective improvement actions.