Mark Mayers
Mark's an illustrator and print designer from Cornwall in the UK, who's been using Illustrator and Photoshop since 1995. He also contributes tutorials for some of the worlds leading creative publications. Head over to his website, or his regular tutorial slot over at Psdtuts+.
Tutorials

Create a Mixed Style Collage

Create a Fantasy Underwater Scene

Use Color-Logic Plug-ins to Create a Metallic Magazine Cover - Part II

Use Color-Logic Plug-ins to Create a Metallic Magazine Cover - Part I

Create a Biomechanical Floating Ecosystem

Developing a Diverse Range of Illustration Styles

Create a Cosmic, Dreamlike Composition

How to Create a Mythical Creature Photo Manipulation

Combine Hand-drawn Art with Photoshop

Create a Fantasy Map Illustration

Create an Awesome 3D Anaglyph Poster

Create a Big Air Event Poster with Photoshop and Illustrator