Higher end cameras can allow you to create amazing effects like a shallow depth of field. Depth of field (DOF) is the distance between the nearest and farthest objects in a scene that appear acceptably sharp in an image.
This effect can be easily done by adjusting the aperture settings on a SLR camera.
However, millions of photographs are taken with cell phones now and the tools you have with a professional camera don't allow these kind of adjustments.
Photoshop allows you to recreate a shallow depth of field with tools like the Iris Blur as shown in my example.
The Iris Blur allows to to set your own DOF with easy to use handles to customize the range and focus of blur to suit your own needs.
It even offers a great "bokeh" effect. With the bokeh effect you can emphasize certain points of light in the image to make the image even more stunning.
To experiment with creating a faux DOF here is all you need to do.
In Photoshop go to Filter > Blur > Iris Blur
Note: You can even fine tune the inner blur by using the alt/opt key to move the dots independently!
Use the provided Bokeh effects to add emphasis on any background light.
With these fine tools in Photoshop, you can now create your own custom Depth of Field without a high end camera!