My mentor (portrait drawing)

Hi fellas good evening to you all.
A portrait profile view of a long time beautiful mentor dedicated today for her on my page.

Making my portraits look exactly like the person I'm drawing?
This is quite challenging to master, particularly, when drawing the person in front of you, as you have no grids or any other means to perfectly sketch it.

using your intuition or exercise your eyes to see beyond. You have to be a profound artist, as an artist, you must be able to draw anytime without gridding.

I plan my drawing with shape of the profile view then usings line and curves to represent the face.
Follow by shading after the quick sketch of the picture.
My intuition and perception.Observe you have to be a good observer to know the differences between left and right eyes.The shading will give the beauty to the result. You have to take your time in shading to give the fine details.
Get to a stage of finishing where i checked in detail look out for the imperfections. Freckles moles, lines and wrinkles, scars, asymmetry these are the features which really make a portrait feel existing and be in the right mood. Thanks.