The closure of a project is the opportunity to release resources from the project, write a closure report and pull lessons learned.
It is also the opportunity to thank the resources having worked for your project.
Thanking resources after a project will probably make you sympathetic of course but it will before everything increase your visibility and ensure a commitment of the resources during your next project.

• Thank your direct team.
• Thank external resources having participated.
• Plan clearly a celebration party as soon as you plan the project.

Thank for the past. Think of the future.