My efforts

I am working on 3d look.

I am practising and the faces look 3d now. I follow a mixture of Andrew Loomis and Asaro head principles. I draw four parallel arcs. And a hemisphere suitably. Remember the hemisphere has to be sliced suitably. Then I begin from ear. From ear arcs to nose line, chin line and two lines to eye. Then lip ends to eye balls which is almost straight. Then from nose balls to lower side chin. Lower side chin to nose-eye joint. Then upper side chin to side eye brow. 

Practising above gets me planes of faces. Then I work on planes of head. Then eyes as much as possible. Then nose planes as much as possible. 

My faces are small. I will be working on large faces. A4 size.