Photomanipulations are one of the best ways for people to begin using Photoshop, as it exposes you to a wide variety of techniques within the program while still allowing for a base image to be worked on, reducing the problems with color control, composition, contrast and quality. Thus, you can quickly learn how to manipulate, digitally paint, and design a variety of interesting artworks in Photoshop without too much prior knowledge.
Here are some fun and useful photomanipulation tutorials for Photoshop beginners, though experts may learn a thing or two as well.
Tron Inspired Photomanipulation
Vibrant Concept Photomanipulation
Dark Zen Composition in Photoshop
Color Wizard in Photoshop
Dark and Surreal Photomanipulation
Transforming a Girl into a Milk Figure
Sexy Mechanical Pinup in Photoshop
Greek Sculpture Photomanipulation
Sleep Japanese Village Manipulation
Dramatic Fantasy Photomanipulation