The colored Pencil: Getting Started with Janie Gildow. Teaches how to use the colored pencils ant the different techniques; Bonus Clip: Blending with Colored Pencil
Reverse Grisaille method by David Dooley > learn his techniques here. ^ch -- I dont really use colored pencil, but its still an interesting reference.
10 Video Tutorials on Skin Coloring Techniques with Colored Pencils or Markers by Sarah Renae Clark