Ask each team member to try to briefly describe how their neighbour to the right felt during the iteration. Their neighbour confirms or corrects their guess. Once all participants said what they think about how their teammates felt, you get an idea of how connected they are, how the communication is flowing in your team and if people are aware of the feelings expressed, in some way, by others.
Collect some news headlines in advance and take them to the retrospective to serve as examples. Try to gather a mixture of headlines: factual, opinion, review. Place the headlines where everyone can see them. Hand out sticky notes. Give team members 10 minutes to come up with their own headlines describing newsworthy aspects of the sprint. Encourage short, punchy headlines. Stick the completed headlines to a whiteboard. If any cover the same news item, combine them. If any are unclear, ask the reporter for details. Vote on which news items to discuss and analyse in more depth.
State the topic that the team will explore in depth (deployment processes, peer-programming, Definition of Done, ...). Break the room into groups of 3-4 people each. Give them 5-7 minutes to list all contributing factors, drivers and actions that make up the topic. Go around the room. Each group reads 1 of their sticky notes and puts it up inside the force field until no group has any items left. Cluster or discard duplicates. Repeat the last 2 steps for factors that inhibit or restrain the topic from being successful or being as effective as it could be. Review all posted items. Add any that are missing.
To identify the most influential factors, everybody gets to 4 votes - 2 for contributing factors, 2 for inhibitors. Tally the votes and mark the top 2x2 factors with big arrows. Spend the last 15-20 mins of the session brainstorming ways to increase the top driving factors and decrease the top restraining factors.
Prepare a flip chart with 3 columns titled 'What', 'Who', and 'Due'. Ask one participant after the other, what they want to do to advance the team. Write down the task, agree on a 'done by'-date and let them sign their name. If someone suggests an action for the whole team, the proposer needs to get buy-in (and signatures) from the others.
Divide a flip chart in 3 sections titled 'More of', 'Same of', and 'Less of'. Ask participants to nudge your behaviour into the right direction: Write stickies with what you should do more, less and what is exactly right. Read out and briefly discuss the stickies section-wise.