Interactive workshop on how to prepare for collaborative modelling workshops, especially with large groups or environments where goals are hard to pin down, politics are involved, or resistance to change is expected. Covers finding a shared understanding of the workshop goal, awareness of hidden agendas and group dynamics, aligning relevant stakeholders, choosing the right flight level, and designing a fitting storyline across formats. Utilizes the Como Prep Canvas to guide facilitators and surface assumptions; see also the Como Prep Canvas at https://github.com/ddd-crew/como-prep-canvas.