How do you make a sketch of someone more flattering?

[Uberloitenment]

If you are drawing a portrait of someone, for instance with a pencil, what techniques are used to make the sketch more flattering?

[cazzz1975]

smudging using soft pencil (2b)
dont be heavy handed when drawing the face or the facial features
use a putty rubber to highlight areas
omit to drawing EVERY crack and crevice

[Uberloitenment]

Thank you!