i know how much c4ds can help but i didnt have any that fit well. also i dont have a clue about curves haha.
Haha, well i like curves.
Try it out, In PhotoShop go to 'Layer > New Adjustment Layer > Curves'
If you did that correctly something that looks like this should appear in panel to the right.
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Now just pull the line up, down, left, right for different effects.
Feel free to use the modified siggy i made for you above.