Sharpening in LAB Mode

[Fabs Forns]

One way to avoid halos and artifacts is sharpening your files in the Luminosity channel in LAB color.
Quite easy to do.

Go to Image>Mode>Lab color
Go to the Channels in the Layers palette
Select the Luminosity Channel. Your image will look black and white
Use Smart Sharpen at 100%, remembering, the bigger the file, the more sharpening you'll need.
Apply the sharpening.
Got back to Image>Mode>RGB color