I did another portrait sketch based on Michael R. Britton's Art Academy newsletters - this was in the April 2006 newsletter(http://www.artacademy.com) showing the figure lying down and foreshortened. He did his version in watercolor and showed how he placed a rectangle around the head to get the placement right.
I did the same thing when drawing mine so I'd have an idea where everything went - it did help a lot. Then just erase the lines of the rectangle and shade in your parts and go. This is graphite on Strathmore drawing paper about 9" x 11"
And the day wouldn't be complete without another nose - so here you go.... :)