Colorful Swirl

Tutorial used: http://phonuts.org/tutorials/special-effects/colourful-swirl/

Start with clouds.

Pixelate.

Use radial blur of 100 twice.

Twirled 120 degrees.

Layer duplicated, twirled -180 degrees and blending mode turned to lighten.

Changed the hue of both layers.

Final result

This is a really cool and simple effect in my opinion. While doing this I realized that I am getting extremely comfortable with Photoshop and it is getting smoother and easier to translate ideas in my head directly down to the program.