Making cuts...

This wasnt meant to be a public WIP cuz its my first head :expressionless: but i need some advice. I need some help adding geometry with the knife tool to do the eyes and mouth. If anyone has any reading on how to use/cleaning up after the knife tool that would be nice too.

Subsurf 1 /w Optimal:

feel free to mark up the pics :wink: (I encourage it)