1. Open a picture in photoshop (I used this one).
2. Now duplicate that layer (layer - duplicate layer) and add a gaussian blur (filter - blur - gaussian blur) with a radius of 5 pixels (higher or lower radius when you have a big or small photo)…
3. Now just change the blending mode of the top layer to overlay and surprise yourself of how nice your pictures can be with a little photoshop trick!
4. And this is how it looks when you compare the pictures!
More Tutorials: 
