Since long time I have been a big fan of David Ziser and his Digital Pro Talk Blog. I believe this blog is one of the best blogs for wedding and portrait photographers. I love the fact, that in his blog he has a lots of video tutorials from great photographers,with very different approach and style. Here it is a great tutorial from his blog,which I found very useful.
Photoshop Fashion Secrets w-Suzette Allen from David Ziser on Vimeo.