Step by step guide: How to built a structured under-drawing
Right and left hand silouette drawing: Start with your regular hand and follow with your other hand. Make sure you think of your system, how to be able to use your negative space (as for what body parts, eg. torso you want to draw first).
Shape underdrawing (with the wide of your pastel). Then contour (1 continious line, mapping) on top. Draw slowly and pay attention to all curves and details. Even shadows are described with line.
Always be aware where your center front or back of the pelvis are. Remember the S-curve. Compare the center of the ankle bone (of the weight-leg) to placement of hip/waist.
Draw weight-leg first, always. Pay attention to negative space between legs.
When we draw the fashion face, it is important to edit. We stylize everything. Start out drawing softly, then add accents and contrasts at the end. (Working in layers)