Mark Earls points out the powerful influence of our eyes.

But eyes also work on us in a much more subtle and interesting way. They keep us in line. You know the feeling of being watched? Well, one psychologist, Melissa Bateson found that contributions to the honesty box in the psychology department communal coffee room increase 3-fold when a pair of eyes is stuck on the wall.

I love this. And this is just our eyes - what are all the other unconscious ways in which we influence and affect each other? For me, its another reason to question the value of those long, written documents attempting to get everyone to "buy in" to a strategy.