Open your image :
Duplicate the background layer by pressing control+J. Press shift+control+u to desaturate the layer.
Go to filter>others>high pass and give these values :
Press control+L to open levels. Move the sliders as shown:
Finally, change this layer's mode from normal to overlay. If you find excessive sharpening then reduce the opacity of this layer. You now have more sharpe image and it works on almost any image :)
More Tutorials: 
