Now for the nose. This part is pretty simple actually, as most of the work was already done out of necessity when creating the eyes. First, a loops is cut going from the bridge of the nose, down and around the lips to create the nasolabial fold (laugh line). A cut is also made around the nostrils, then connected to give me the necessary verts to shape them.
Shaping, shaping, shaping…
Finally, extrude the nostril just a dash, and voila.
From Gray 