Sharpening

Sometimes if you focus is a little off and you want to sharpen an image, you can do it easily as follows:

1.) Duplicate the background and call this new layer "sharpening"

2.) Go to FILTER > SHARPEN > UNSHARP MASK

3.) Adjust the Amount  &  Radius (radius usually no higher than 3). These numbers depend on file size.  Eye-ball it then click the preview box on and off to see how it looks.

4.) When you're done, hit OK and you can always decrease the layer opacity if it's too strong. Alternatively, you can make a mask, invert it and paint white just over the areas you want sharper (like the eyes of a portrait for example.)