Necros [Tutorial] by Khempavee
Zbrush Hand modelling complete process
Soule Designs - Skull studies
Sakaki's SketchBook & Video - Page 2
Good reference on how to block out characters. Remember, if your taking more than thirty minutes to block out what you're doing, you're going to be taking too much time.
Free Fur Brushes, jarred everson on ArtStation at https://www.artstation.com/artwork/1WB03
Free Download Hard Surface Brush Pack by ANDREW AVERKIN ANDREW AVERKIN is a 3D Artist from Odessa, U
Great 3D model process shown here. It's helpful to look at this and see the transition from basic shapes into a highly detailed mesh.