Being able to draw a face is considered to be an outright talent by many. This kind of talent is also possessed by a lot of artists. However, the ability to realistically draw a face would be a different subject matter at hand. If you want to learn to draw faces, doing it the realistic method would be the best way to do it.
Map And Plan
Although it may seem complex, drawing faces is quite simple. Just as with any kind of art, there are some basic guidelines that you can follow and use. One of these would be mapping. For you to have a realistic output, you should be able to map the face correctly. This is imperative, before you even add on finer details.
You should not just out rightly copy the face of your model as if it were some outline on a kids coloring book. Certain preliminary steps are needed if you want your drawing to have form, structure, depth and a convincing aura.
The Egg
You can start mapping out by using the egg technique. Do this by drawing an oval that has the shape of an egg. Try to find its center and draw a line downwards to it. Take note of this line. It would be a very important landmark for you throughout your drawing...