When talking to groups about knowledge transfer I like to contrast the relative effectiveness of communicating in different ways - by getting participants to think about shoelace tying.
Imagine you have to instruct someone who has never tied a lace before...
In the first instance, you can talk to your pupil and describe the action of what to do, but not show them or touch their laces (impossible)
Secondly, you can write down what to do and provide diagrams (better, but really difficult to follow)
Lastly, you can show them a video of precisely what to do for them to follow (pretty easy)
I'd never actually got round to making the video to demonstrate this. Now I don't need to.
This 3 minute TED.com talk from Terry Moore could change your life. It shows how to tie your shoelaces, correctly. As Terry says "By the age of 50, you would have thought that one of life's skill I would have really nailed was tying my shoes".