Ask each team member to briefly describe how their right neighbour felt during the iteration. Their neighbour confirms or corrects the guess. Once all participants shared their best guess about how their teammates felt, you get an idea of how connected they are, how communication is flowing in your team and if people are aware of the feelings expressed, in some way, by others.
This is a round-based activity. In each round you ask the team a question, they write down their answers (gives everyone time to think) and then read them out to the others. Questions proposed for Software Development teams:
When was the last time you were really engaged / animated / productive? What did you do? What had happened? How did it feel?
From an application-/code-perspective: What is the awesomest stuff you've built together? What makes it great?
Of the things you built for this company, which has the most value? Why?
When did you work best with the Product Owner? What was good about it?
When was your collaboration best?
What was your most valuable contribution to the developer community (of this company)? How did you do it?
Leave your modesty at the door: What is the most valuable skill / character trait you contribute to the team? Examples?
What is your team's most important trait? What sets you apart?
('Remember the Future' (#37) works well as the next step.)
Divide a flip chart into boxes headed with 'Start', 'Continue' and 'Stop'. Ask your participants to write concrete proposals for each category - 1 idea per index card. Let them write in silence for a few minutes. Let everyone read out their notes and post them to the appropriate category. Lead a short discussion on what the top 20% beneficial ideas are. Vote on it by distributing dots or X's with a marker, e.g. 1, 2, and 3 dots for each person to distribute. The top 2 or 3 become your action items.
A good debriefing deepens understanding, learning and sharing. Preparation: Download and assemble the Debriefing Cube and cards.
During the retrospective, roll the cube. Then draw a card from the category it shows and use it to prompt a discussion. Repeat as time permits.
This will broaden your debriefing options and is especially great for groups without a facilitator to enable them to effectively debrief on their own.