A friend asked me for help making an icon. I answered "play with layer styles and opacities", to which he gave me a LOOK and told me to illustrate it. Tada.
First I'll borrow a base image from
lirimaer. That's the base I'll use in all samples so the attention can be on the effect itself, and the slight differences from one to another.
How the image looks when you duplicate it and apply a layer style:
How the image looks when you put a colour layer on top of it and apply a style to the solid colour layer:
How to use styles on text layers:
I hope this helps a bit. Now go practice.