The National Coalition for Dialogue and Deliberation is working on a project to set a number of principles for public engagement. Here are the seven they have identified so far:
The Seven Core Principles
1. Preparation – Consciously plan, design, convene and arrange the engagement to serve its purpose and people.
2. Inclusion – Incorporate multiple voices and ideas to lay the groundwork for quality outcomes and democratic legitimacy.
3. Collaboration – Support organizers, participants, and those engaged in follow-up to work well together for the common good.
4. Learning – Help participants listen, explore and learn without predetermined outcomes — and evaluate events for lessons.
5. Transparency – Promote openness and provide a public record of the people, resources, and events involved.
6. Impact – Ensure each participatory effort has the potential to make a difference.
7. Sustainability – Promote a culture of participation by supporting programs and institutions that sustain quality public engagement.
I like these, and I like the deeper elucidations of these. It would be a failry simple thing to make a deep workshop structured around these principles. Read more at Public Engagement Principles Project – Version 2.4: Core Principles for Public Engagement.