Learn how to draw realistic hair. Follow along with this drawing instruction on proko.com/17
Tutorial: How to Draw Lips A very simple way to draw lips. You can even use this method to draw different types of lips by making just a few changes in step 1.
Perspective perhaps-tutorial 2 by *Megan-Uosiu on deviantART
Bear concepts on Behance
TOW-4 Shading Faces by verticalfish.deviantart.com
Mouths tutorial by polararts.tumblr — drawing references anatomy
This is really helpful! I seem to have trouble drawing semi-realistic lips so this helped.
Olivia-Fayne Tattoo Design - EYE CANDY