The post on InstantShift list a 88 Ultimate Round-Up of Photoshop Photo Manipulation Tutorials, they are easy to follow and cool.

Below are few examples

Dazzling Dance Photo Manipulation

The Making of “Constant Slip”

Create a Photo Manipulation of a Flooded City Scene

Create a Stunning 3D Liquid Explosion Artwork

Create frozen liquid effects

Awesome Avatar Transformation

Create An Amazing Alien Invasion

Age Progression

You can read more and try them