The first two parts of this "Be Prepared" stuff focused on gear, including one's brain-- your brain being a piece of gear that should always be with you when shooting. (It should probably always be with you whatever you're doing.)
This time out, I thought I'd babble on a bit about some intangible (perhaps nebulous?) things like shooting with your client's shoes on -- allegorically, of course -- and having passion for what you're doing.
I've rarely, if ever, met a serious photographer who wasn't passionate about his or her work. By "serious photographer" I mean someone who thinks of (and pursues) photography in ways beyond merely using a camera to capture an image of a moment in time simply for the sake of having a photographic remembrance of that image or moment. Generally, that form of photography is called a snapshot. READ MORE?
(Caution: Link Contains NSFW pic.)