I found a few more tutorials and free guides about drawing / painting , for those interested take a look at the links :
Copyright free reference photos from Europe, US etc and a few ink drawing tutorials - http://www.peninkwatercolorsketching.com/free-sketching-photos-europe/index.htm
Drawing with charcoal tutorial - http://drawsketch.about.com/od/charcoal/ss/charcoaldrawing.htm
Tutorial with videos about watercolor painting, drawing & more - http://www.how-to-draw-and-paint.com/watercolor-painting-techniques.html
I hope you find these useful. If you have any questions just contact me !