This is one I really rate!   Sean Tucker shares a little bit of the history of dodging and burning in photography, as well as 3 techniques in Adobe Photoshop (using curves, grey layers and blending modes) to shape the light and shadows in your images. It covers portraits and street photography.  

The link below (image) will take you to a website by Derek Forss.  These are a series of tutorials covering basic camera usage and much more if you explore.  You may find them informative:

If you enjoyed David Keep's talk on Underwater Photography (14th Oct) you might be interested in a couple of tutorials he has posted on his website:  'Sharpening Images for Print' and 'Printing from Lightroom'.  These were brought to my attention by Paul Francis.  They are really worth a visit.  (Click on the image to link to the tutorials)

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This link will take you to a rather complicated video covering the 'Shadows and highlights' function in Photoshop.  I've watched several times and it does take some digesting.  However I do believe it's worth persevering with because it opens up a look at 'smart objects' and extra menus which give very accurate control over your work.  Of course if you are one of our high fliers you will probably be familiar with this already.