Tutorial 1: Shia LaBeouf.

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Made in PS7.

You might need make some adjustments, depending on your base.

1.) Duplicate your base and screen it to your liking. I put mine to 100% opacity.

2.) Layer / New Adjustment Layer / Selective Color
Reds: -36, 38, -27, 100
Yellows: 5, 5, -41, -17
Greens: 0, 0, 0, -100
Cyans: 0, 83, 0, 86
Blues: 48, -55, 0, 42
Whites: 68, -53, 58, 31
Neutrals: 48, -17, -45, 15

Result One:

3.) Layer / New Adjustment Layer / Selective Color
Reds: -71, -71, 49, -82
Yellows: 44, 52, -67, 50
Greens: 0, 76, -93, -86
Cyans: 76, 52, -25, -10
Blues: 0, -41, 18, 11
Whites: 0, 21, 22, -63
Neutrals: -41, -16, 10, 1

4.) Layer / New Adjustment Layer / Hue/Saturation
Hue: -2
Saturation: 15

5.) Layer / New Adjustment Layer / Color Balance
Midtones: -12, -39, -28
Highlights: 0, 0, 17
Shadows: -39, 3, -10

Result Two:

Other Examples
First Result