We often think that adding a picture of what we are trying to store is overkill. Wouldn't a nice label with a part number and description be enough? Maybe. . . but in our pursuit of excellence perhaps we need to think more basically. A picture's worth a thousand words.
Every week Unclutterer features their workspace of the week and many times I have seen great examples of clean, organized workspaces. I love to use pictures like these in my 5S kaizen events. If kids can do it, why can't we?
More description of the classroom here.