Distribute index cards and markers. Set a topic, e.g. one of the following:
How did you feel during the iteration?
What was the most remarkable moment?
What was the biggest problem?
What did you long for?
If the last iteration had been a circus performance, what part did you play? Juggler, funambulist, clown, knife-thrower, ...
Ask the team members to draw their answer. Post all drawings on a whiteboard. For each drawing let people guess what it means, before the artist explains it. Metaphors open new viewpoints and create a shared understanding.
Draw a table with 3 columns. Head the first one 'Destination', the second one 'Delay' and the last one 'Announcement'.
Introduce the scenario: 'You are at a train station. Where is your train going? (It can be anything, a fictional or a real place.) How much of a delay does the train currently have? And what is the announcement? Why is there a delay? (This can be a real reason or modeled after the typical announcements.)'
Each team member fills out 3 sticky notes, 1 for each column. Going around the circle, each team member posts their notes and explains briefly, why they're going to destination X and why there's a delay (or not).
Trains and train delays are very familiar in Germany. Depending on your country and culture you might want to pick a different mode of transportation.
Asking and answering go around the team circle - an excellent way to reach consensus Source: Agile Retrospectives
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.