How do participants feel at the retro: Explorer, Shopper, Vacationer, or Prisoner? Source: Agile Retrospectives
Prepare a flipchart with areas for E, S, V, and P. Explain the concept:
Explorer: Eager to dive in and research what did and didn't work and how to improve.
Shopper: Positive attitude. Happy if one good things comes out.
Vacationer: Reluctant to actively take part but the retro beats the regular work.
Prisoner: Only attend because they (feel they) must.
Take a poll (anonymously on slips of paper). Count out the answers and keep track on the flipchart for all to see. If trust is low, deliberately destroy the votes afterwards to ensure privacy. Ask what people make of the data. If there's a majority of Vacationers or Prisoners consider using the retro to discuss this finding.
Set up a 'retrospective mailbox' at the beginning of the iteration. Whenever something significant happens or someone has an idea for improvement, they write it down and 'post' it. (Alternatively the 'mailbox' can be a visible place. This can spark discussion during the iteration.) Go through the notes and discuss them. A mailbox is great for long iterations and forgetful teams.
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 dotsor 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.
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.