how to use plot points to make observational drawing easier
The following video and the accompanying article contain clips from a full-length tutorial video series I did for members of Let's Draw People Club. It's from the "Noah" Video Series and demonstrates how to identify specific plot points on the face and use those plot points to draw a person's face using observational methods.
If you are used to drawing with a grid, then sharpening your observational skills will allow you to draw a face or other subject without being so reliant on a grid.