Check out some of Joey Zeledón’s work for reference: http://instagram.com/joey.zeledon
My advice is to develop a library or vocabulary of frequently needed aspects of the anatomy and practice those until you have your version of each that you can easily draw. Here is a practice list:
- figure, standing
- figure, sitting
- hand, open
- hand, clutched
- foot, at rest
- foot, flexed
- head, no features
- head, minimal features
- nose
- eyes
- mouth
- forearm