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Memorize these basic "rules" for idealized faces, and you can't go wrong. Once you can confidently follow them, then you can start adapting them to give your faces more individual personality (changing eye shape, placement, size, browbone, ears, etc...

http://drawinglab.evansville.edu/face.html

http://www.artist-how-to.com/facialproportions.htm

Practice every day until you can do these proportions without thinking.

Draw an egg. Divide it in half down the middle. Now divide it in half horizontally. Now divide each half in half so top to bottom it is in quarters.

The top quarter is the hair. Below it is the forehead. Draw the eyebrows along the bottom and draw the ears so the top is even with the eyebrows and the bottom with the line below. In the center of that line draw the nostrils and the base of the nose. Now one more line, half way between the base of the nose and the bottom, which is the chin. That is the mouth. For the jaw line, bring two lines down vertically from the ears to even with the mouth. Then they shift direction and CURVE in to the bottom of the egg where the chin is.

Done.

There is room for argument. Individual proportions vary. Thus the proportions I've given are a guide not a rule -- all proportions are -- and some people say draw the eyes, not the eyebrows -- halfway down.

In other words, it may well be that at least on some drawings your critics are wrong.

Unfortunately, drawing the human head in proportion is a detailed subject which can't be explained in a few sentences. The other answers posted are correct for drawing the front view of the face, but in order to master drawing the head from all angles requires much more skill and knowledge. I strongly recommend buying the book "Drawing The Human Head" by Burne Hogarth. This is the NUMBER ONE book you should own!!!! This book gives detailed information on drawing the head from any angle in correct proportion! Some people complain that they don't like Hogarth's drawing style. This book is not telling you to copy Hogarth's style of drawing, but it is teaching you where to place the features on the face correctly. You can buy Hogarth's book on Amazon official website. The SECOND book to buy to help further your studies of correct proportion is "The Painter's Corner: Heads And Portraits" by Parramon's Editorial Team (Published by Barron's Educational Series). This book is out of print but you can buy it used on Amazon. I guarantee you that if you study these two books and practice drawing the pictures in these books, you will never have a problem with proportion again!!!

Producing a portrait of quality might appear like it is really a lifetime away. It's not...  When you go through that class, Realistic Pencil Portrait Mastery from here https://tr.im/S79Pc you will quickly see how fast you will have a way to bring quality images yourself.

One of many first notable features of Realistic Pencil Portrait Mastery was how comprehensive the class was. You can find around 605 pictures and pictures in that program, which is really a great thing because learning how to pull pencil portraits involves lots of visuals.

There are also around 260 pages of led recommendations because Christopher Sia, the writer of this manual protected a wide selection of subjects, from precisely stuffing out the iris to a particular two stroke approach that adds reality to hair.

haha, hope i can help you, as a human face gets older, cheek muscles becomes broader and longer or holding more muscles that may decrease the enlargement of eyes and lips, and the nose won't stay that way, he nose might not seem cute when he got older, perhaps it may grow taller.