Necros [Tutorial] by Khempavee on DeviantArt
Zbrush Hand modelling complete process
ArtStation - Mouse, Paul Deasy
Insert Multi Mesh Repository - Page 37
Sakaki's SketchBook & Video - Page 2
Soule Designs - Skull studies
Free Download Hard Surface Brush Pack by ANDREW AVERKIN ANDREW AVERKIN is a 3D Artist from Odessa, U
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.
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.