How to paint Foliage Using Negative Painting in Watercolor. This is a really lovely demonstration of how to paint a tree by Rowland Lee.
Step by Step Realistic Pencil Portrait Drawing Tutorial
Sketch Dump: Arms by ~Bambs79 on deviantART https://www.facebook.com/CharacterDesignReferences
Lips. | 17 Diagrams That Will Help You Draw (Almost) Anything
I found this every helpful with my drawings!