I regularly contribute to a great site called TipSquirrel.com which is all about Photoshop.
Over the years I've written several tutorials, but I've also recorded a bunch. These are typically never released anywhere else and often take a really close look at my workflow from start to finish. Well, here they are gathered on one page.
Go enjoy some free learning! – http://www.tipsquirrel.com/videos-by-rich-harrington/