I was looking at one of those feed things on Facebook where friends post stuff and one of my more techie friends posted a link to a video originally made for Scott Kelby's Photoshop Insider's blog by Atlanta based editorial photographer, Zack Arias.
If you are a photographer, it will likely speak to you on some level or many levels. Don't let the first 90 seconds or two minutes put you off. It is really good stuff.
Zack Arias' post with the video on his own page is here.
Mike Wood Photography