Sharpening - Ken Rockwell
Filter > Sharpen > Sharpen. Poor to Good: Unsharp Mask. Filter > Sharpen > Unsharp Mask > 50%, 1 pixel radius. (mouse over for 150% at 0.3 pixels.) The Unsharp Mask filter is poor at its defaults. At its defaults it's the same as the Sharpen command, so why bother? I forget Photoshop's default percentage, I think it's 50%.