GroupWorks is a deck with 91 cards each about one pattern that helps groups to be effective while including everyone and having as positive an experience as possible. As one of the people who helped develop the patterns, I would be happy to show you the deck, explain how they can be useful, answer your questions, and even apply them to a specific group you are in or are planning for.
From the groupworksdeck.org website:
"The Group Works card deck is designed to support your process as a group convenor, planner, facilitator, or participant. The people who developed this deck spent several years pooling our knowledge of the best group events we had ever witnessed. We looked at meetings, conferences, retreats, town halls, and other sessions that give organizations life, solve a longstanding dilemma, get stuck relationships flowing, result in clear decisions with wide support, and make a lasting difference. We also looked at routine, well-run meetings that simply bring people together and get lots of stuff done."