First we will make custom brushes, then we will learn how to put together a custom User Interface for speed. After that we will delve right in using DynaMesh and masking to pull out our shapes. We will continue refining the head and polishing it to get a clean sculpt. Then we will add a hat and sweater along with fiber mesh hair. Lastly we will setup a light cap, and render out a character sheet and a turntable with professional results.

Home page - http://www.digitaltutors.com/tutorial/753-Speed-Sculpting-a-Cartoon-Head-in-ZBrush