The team nominates stories for awards and reflects on the winners Source:
Display all stories completed in the last iterations on a board. Create 3 award categories (i.e. boxes on the board):
Most annoying story
... 3rd category invented by the team ...
Ask the team to 'nominate' stories by putting them in one of the award boxes. For each category: Dot-vote and announce the winner. Ask the team why they think the user story won in this category and let the team reflect on the process of completing the tasks - what went good or wrong.