You need: A wall or floor space Post-its (scraps of paper and tape work in a pinch) Big blank paper, whiteboard, or chalkboard Writing utensils People with ideas Develop a skeletal structure for the agenda.124 How many days, how many sessions, how long are the sessions, how long are the breaks and transitions, when are meals, etc.? Some tips on this: A good conversation between five and fifteen people needs 1.5 to two hours. Sessions where people are trying to dive deep or resolve something in thirty, forty-five minutes, even an hour, often result in frustration.