Lots of mistakes in this one (drawn from a photo). I did it in layers, using pastels, coloured and graphite pencils and pen. I used whichever colours I had to hand, based on tone and not actual colour, giving this slightly unusual result. Needed a brush to apply white-out to the eyes, but couldn't find one!
Still need to do a lot of work getting proportions and shapes right at the start of the drawing.