Step-by-Step Drawing Faces. This is a good base sketch for the perceptions of self/other process assignment. Bright colours or patterns could then be added to reflect upon the personality of the person being illustrated.
Charlotte Caron's heads. Wow these are the most disturbing animal heads I've seen in a while. Glad someone refreshed the whole "animal head" genre, which has gone the cutesy genteel route the last couple of years.
How to Create a Low Poly Art Self Portrait Tutorial