Rule #1: There is no such thing as a bad idea.  We never know how one idea (however far-fetched) might lead into another one that is exactly right.

Rule #2: We don’t talk yet about why not.  There will be plenty of time for realities later, so we don’t want them to get in the way of the good ideas now.

Rule #3: Nothing should stifle the flow of ideas.  No buts or can’ts or other “stopping” words.  We want to hear words such as “and”, “or”, and “what if?”

Rule #4: There is no such thing as a bad idea. (We take that one very seriously.)

Excerpted from The Imagineering Field Guide to Disneyland.