Well today I am looking into returning to a method I used some time ago. I like to create tonal drawings of people, usually grandchildren or friends, this it is an exercise in proportion and form. I initially use the drawing to understand the structure and shapes contained the face and body. Its is interesting to allow the shapes and proportions to start to create a likeness. I will often use a grid to ensure proportions are correct I find by doing this in the studio where I have time to consider what and how to make marks informs my sketching style when I am out and about with a sketch book and I always have a sketch book in my pocket.
One considered drawing and three sketches of different time duration.