Others do it by means of the clothes they wear: which may be that old standby, all black; or maybe something a bit more sophisticated and bought on credit from Paul Smith. And there's always a little sub-group who do it with accessories: the latest electronic device taken along in order to take notes. Or those on a more modest budget might choose a Moleskine. Either way, it's a way of setting ourselves apart from the client - and to remind them that we 'think different'.
As for me: I wear design socks.