As discussed in the previous blogs, the key point is to avoid the meaning being too obvious in the metaphor. Not that is has to be completely obscure, but avoid the conscious connection to the story. So how do you do this?
A really useful way is to focus on what the problem is an example of. For example, someone who constantly behaves in a disruptive way could be an example of wanting attention, so the story would want to be around the theme of a demand for attention and the conscious content would be based on something of interest to the client.