Below is an extensive list of retouching and post production videos and tutorials which I highly recommend.

CONCEPTS

**New Article** -
http://www.diyphotography.net/the-power-of-color-and-color-harmonies-in-composition/

Thoughts on Contrast by Guy Gowan
http://www.guygowan.com/focus/video.php?&userid=169

Thoughts on Colour by Guy Gowan
http://www.guygowan.com/focus/video.php?&userid=167

Thoughts on Sharpening by Guy Gowan
http://www.guygowan.com/focus/video.php?&userid=168

Thoughts on Recovery by Guy Gowan
http://www.guygowan.com/focus/video.php?&userid=2164

Thoughts on HDR by Guy Gowan
http://www.guygowan.com/focus/video.php?&userid=2157

Thoughts on Black and White by Guy Gowan
http://www.guygowan.com/focus/video.php?&userid=2138

Videos

Editorial Retouch from Start to Finish Series Episodes 1-13 by Krunoslav Stifter

The Differences between brightness and Luminosity with Conny Wallstrom

[embed width="123" height="456"]https://www.youtube.com/watch?v=N1Mq3O0ahTU[/embed]

Adding shine or Pop the Highlights with Gry Garness

[embed width="123" height="456"]https://www.youtube.com/watch?v=WUtd2wf-ca8[/embed]

An Overview of Colour Grading with Natalia Taffarel

[embed width="123" height="456"]https://www.youtube.com/watch?v=25QarOEIPkY[/embed]

An in-depth analysis of Colour Palettes and Retouching with Natalia Taffarel

[embed width="123" height="456"]https://www.youtube.com/watch?v=gzchCaOJ67g[/embed]

Full Edit with Natalia Taffarel 

[embed width="123" height="456"]https://vimeo.com/68360962[/embed]

Retouching Hair - Clone in Darken Mode by Natalia Taffarel

[embed]https://vimeo.com/25667413[/embed]

Opacity vs Fill by Natalia Taffarel

[embed]https://vimeo.com/13868502[/embed]

How to use Supporting Layers for Editing images with Jonas W

[embed]https://www.youtube.com/watch?v=oBK83DZpdEQ[/embed]

Glamour Retouching Part 1 With Carrie Beene

[embed]https://www.youtube.com/watch?v=42MUfe1llO8[/embed]

Glamour Retouching Part 2 With Carrie Beene

[embed]https://www.youtube.com/watch?v=MAVzBLyoqDY[/embed]

Capture One Pro 8 Webinar | Retouching workflow with Pratik Naik

[embed]https://www.youtube.com/watch?v=8PCK8rXgj9I[/embed]

Dodge and Burn Technique by Sean Armenta

[embed]https://vimeo.com/14381588[/embed]