While learning to draw, I have looked at a lot of tutorials on the internet, but I have found the following to be especially helpful.

Must See

Ten minute drawing techniques - General Drawing, 3d drawing, perspective
An exceptional how to draw/paint series on youtube
[link]

A Good and comprehensive tutorial on digital painting
[link]

Figure drawing books( I personally like Andrew loomis and George Bridgman, WARNING SOME CONTAIN NUDITY)
[link]

Glenn vilppu A old master teaching general principles of drawing.
[link]

A good lesson on lighting
[link]

A exceptional resource for daily drawing practice, contains thousands of high quality pre rendered poses and real time 3d models to draw from.(contains mild digital Nudity)
[link]

A series on perspective thats as good as it is long. I know its long but give it a chance.
[link]


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Very Good

A fairly detailed website on the nature of light, I would have put this in the must see part but its probably a bit technical for most people.
[link]

A program that displays the analysis of a images color data in 3d.
[link]

Ron Lemen - A top notch artist, and a excellent teacher.
[link]
[link] shading value
[link] heads
[link] hands
[link]
more heads
[link]
skin tones
[link]
skin tones 2
[link]
head portraits
[link]
figure drawing from life, mild nudity.

A great blog with key tidbits and insights into the world of drawing.
[link]

cg society SPOTLIGHT ARTIST thread(Nebezial and doctor bone are good, WARNING SOME CONTAIN NUDITY)
[link]

Questions and comments welcome.