This was really fun to make and I learned more about brushes.

Here is the grunge effect I made. It was really simple and fun.

Meme

Brightness/Contrast

 

Levels

Curves

Exposure

Vibrance

Hue/Saturation

Color Balance

Black and White

Photo Filter

Channel Mixer

Color Lookup

Invert

Posterize

Threshhold

Gradient Map

Selective Color

This was really fun to make. That's all there is too it. It's amazing.