Here's another trick I'm proud of: those who design shops know that a recurring need is to have partition walls that can be easily moved to change layouts. The problem is that to make a wall stand you have to make at least an "L" or "U" or worse an "H" composition, or curved, or put in feet, or make a very wide wall, but none of these solutions has ever satisfied me.
The need to design a new furnishing system for a large chain of shops prompted me to find a solution that is a trick so simple and effective that I amazed myself: a flat wall, made of wood or another light material, mounted on small pivoting wheels, solidly attached to a metal display shelf, also with wheels. It's the one holding it up, but no one knows, everyone thinks it's just standing there. Et voilà!