Create your own drawing tool using a tortillon or q-tip, rubbed on a scribbled patch of charcoal. Gentle hatching or erasing and re-shading can create subtle layers, or you can brush on powdered charcoal. Sticks of charcoal can be sharpened with a blade, rubbing on sandpaper or even scrap paper, or with a pencil sharpener for fine lines or crisp edges. Using a soft, toothy paper and and carefully preserving your highlights will allow you to get a full range of tone from dark to white.
Check out some of these ideas for charcoal drawing:
Skull Study by Alberoni
Portrait Drawing by Alberoni
Self Portrait by Grace Calinisan
Portrait of My Brother by R Dennis
Portrait of 2-Pac Shakur By J Egan
Seascape - Beauty at Dawn by J Vishnoi