I've started experimenting with using colored pencils for sketching, so I can layer the sketch with different colors. In this case, by drawing the person in blue and layering on their clothes/armor in purple.
One of these is my WoW Paladin, Katilyn. The other two are fashion/clothing drawing practice sketches that I pieced together from several different references for the clothing. I created the pose references for all of these in DesignDoll.