I found this every helpful with my drawings!
How to draw an eye by rebecca.dennison.12:
How to draw the perfect eye https://fbcdn-sphotos-d-a.akamaihd.net/hphotos-ak-ash4/1005066_457437561018919_39072517_n.jpg
Cómo dibujar un paso ojo a paso por AislingH
Anum Tariq illustration (J.Crew Fall 2015)
How to draw a Mouth. This may come in handy someday.