Sorry, I can't make the tutorial, because I use specific established set ups with photoshop and wacom tablet, and I in vision and see the final image on the blank page before start working, and I make 3 quick strokes and finish an icon, all that allows me to make an icon in minute or two... It is 4 years of continuous work, I can't teach that in one tutorial.
And I don't have time to make long tutorials for now, too busy. However, I 'll find time and make one, just for the communism! ;D