Today. In this tutorial I''d like share with you how to create a Bokeh Effect using Adobe Photoshop CS6

First

Step 1

Duplicate the layer ( CTRL + J )
Make a selection using Rectangular Marquee Tool of the bokeh photo
Use CTRL + C ( copy ) CTRL + V ( paste )
and paste the selection into the main photo
Use CTRL + T ( Transform Tool ) to adjust the photo.
Change the blend mode to Screen
Go to Brush Tool and brush over the area you don't want the effect.

Select the bokeh photo ( you can use any photo with small lights to create this effect )
Go to Filter - Blur - Field Blur ( this is available in Adobe Photoshop CS6 )
Blur the image, add light bokeh and color bokeh as you like.

Make selection using Rectangular Marquee Tool
CTRL + C ( copy ) CTRL + V ( paste ) and paste the selection into the main photo.
CTRL + T ( Transform Tool ) and adjust the file.
Go to Brush Tool and brush over the area you don't want the effect.

Watch tutorial video