Bobbi Newman, a.k.a. Librarian by Day, has compiled some quotes that illustrate the best way for a group to innovate: find people who are inspired to be creative and let them have the room to create their inspirations.
The one thing I would add would be this:
Other people in the group, including the leaders, need to become involved once the innovation becomes part of the group’s operations. Not only does this allow for others to know how the innovative whachamacalit works, but it gives the group as a whole a chance to add their ideas for improving it. Nothing is ever as good as it could be, and as long as it innovation isn’t subjected to “death by committee”, a good group can make a good innovation even better.