These paper-like landscapes illustrated by designer Eiko Ojala are so intricate, you won't believe no software was used to create them. http://www.creativebloq.com/illustration/hand-cut-paper-illustrations-are-perfect-inspiration-3132167#
Bram "Boco" Sels shows us how to develop the head of a character, including some awesome tips for creating hair, in Beginner's Guide to Digital Painting in Photoshop: Characters. Here's a brief glimpse of some of his WIPs!
This website describes the different between The Golden Section The Golden String and Fibonacci Numbers. These all essentially come together to form the same Golden Ratio but help me understand the breakdown of it all and why its so important.