My first and very short tutorial.. please don't bite me. :]]
1. Prep the base -- crop, sharpen, etc.
2. Selective Coloring Layer:
REDS: -84, +21, +8, 0
NEUTRAL: +55, -5, +4, -17
3. Hue/ Saturation Layer:
REDS: 0, +20, 0
And that's it! It doesn't work on all kinds of pictures though. But feel free to experiment with the settings and saturation to get what you want. :DD Hope this tutorial helped!
Other icons made from this tutorial: