Whilst I don't condone this articles sentiment I have used these sites in the past for learning to draw (digitally).

If you like Photoshop:: Free http://ctrlpaint.com

These guys are amazing:: Paid http://www.thegnomonworkshop.com/

and others:: Free http://www.proko.com/videos/

http://theroundtablet.com/

Some inspiration:: http://conceptart.org/forums/showthread.php?870-Journey-of-a...

http://www.deviantart.com/

Probably the biggest factor stopping you from teaching yourself something is your own motivation.