[PM] - How to organize Best Practice meeting with Fun, Game, etc...

[vpautre]

Hi everyone,

I'm new and I have a difficult question to raise.

I'm ending a project. We reviewed the delivery plan with Sponsors and validate it. We responsibilize and organise operational teams to take the lead in support and change management.

One step is missing and I'm not so familiarize with: Lessons learned/Best practices.
The project has raised some frustrations in teams, but the launch is a real success.

I would like to meet the team and organize a "Interactive Best Practices meeting". I would prefer to discuss on "How we can do better, etc" in a way people is not pointing fingers to each other criticizing works done.

My Question is: How can I get Best Practice meeting with Fun, Game, Interactive ?

I'm open for your ideas, and will not forget to share the one I used and feedbacks about it !
Thanks a lot!
Vincent