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.
This activity is helpful when a team is facing an ambiguous, volatile, uncertain or complex set of problems and has many suggested action items to choose from.
Draw a Landscape Diagram, i.e. an x-axis labeled 'Certainty about approach' and a y-axis labeled 'Agreement on issue'. Both go from low certainty / agreement in their mutual origin to high towards the top / right. For each action item ask 'How much agreement do we have that solving this problem would have a great beneficial impact? How certain are we about the first steps toward a solution?' Place the note on the diagram accordingly. When all actions are placed, shortly discuss the 'map' you created. Which actions will give the greatest benefit in the next iteration? Which are more long term?
Choose 2 actions from the simple / ordered area of the map or 1 action from the complex area.
Prepare 3 flip chart papers titled 'Helped', 'Hindered', and 'Hypothesis' (suggestions for things to try out). Ask participants to help you grow and improve as a facilitator by writing you sticky notes and signing their initials so that you may ask questions later.