I see alot of unsharp images on these forums and some people have been IM'ing me asking what I do to sharpen mine. Here's an easy technique I use on every picture to make them pin sharp and it's done like this to prevent color noise and halos.
- open color image
- make sure you have the channels palette shown in the window menu at the bottom of PS
- under image menu, under mode choose lab color
- in the channels palette it changes from color tabs to "lab, lightness, a, b" click on the lightness tab
- in filter drop down menu select unsharp mask filter and use these settings: amount 85%, radius 1 pixel, threshold 4 levels
- if you need a little more sharpening select unsharp mask again and use the same settings one more time or bring down the amount slider to your liking.
- go back to image menu, mode and choose RGB


