Each participant tells a story about the last iteration that contains certain words Source:
Provide everyone with something to write down their story. Then introduce the shaping words, which influence the story to be written:
If the last iteration could have been better: You set a couple of shaping words, e.g. such as 'mad, sad, glad' or 'keep, drop, add'. Additionally they have to write their story in first person. This avoids blaming others.
If the last iteration was successful: The team can either choose their own set of words or you can provide random words to unleash the team's creativity.
Now each participant writes a story of no more than 100 words about last iteration. They have to use each shaping word at least once. Timebox this to 5-10 minutes. When everyone's finished, they read out their stories. Afterwards lead a discussion about common themes of the stories.
Hand out pens and sticky notes. Ask everyone for ideas on how to turn the next iteration / release into a certain desaster - one idea per note. When everyone's finished writing, hang up all stickies and walk through them. Identify and discuss themes. In the next phase turn these negative actions into their opposite.
Asking and answering go around the team circle - an excellent way to reach consensus Source:
Everyone sits in a circle. Begin by stating that you'll go round asking questions to find out what you want to do as a group. You start by asking your neighbor the first question, e.g. 'What is the most important thing we should start in the next iteration?' Your neighbor answers and asks her neighbor a related question. Stop when consensus emerges or the time is up. Go around at least once, so that everybody is heard!
Let team members appreciate each other and end positively Source:
Agile Retrospectives who took it from 'The Satir Model: Family Therapy and Beyond'
Start by giving a sincere appreciation of one of the participants. It can be anything they contributed: help to the team or you, a solved problem, ...Then invite others and wait for someone to work up the nerve. Close, when no one has talked for a minute.