Do get to this stage, I went through my usual workflow of processing the RAW in Adobe Camera RAW (ACR) and then opened it in to Photoshop.

I first started by making selections of the subject. I find it to be much easier and quicker to do all of the selecting first, and then making localised adjustments via an adjustment layer. In this image, I knew the subjected needed slightly more contrast in it. But not all the same amount. For example, the sleeves of the shirt needed more contrast added than his pants.

The areas that I made selections of are:

Green sleeves;

White of the top;

Pants;

Skateboard;

Whole person with and without the skateboard;

the sand of the beach and;

the water.

To make these selections I used a combination of quick selection tool (for the hair, I used the refine edge tool), channel masking and the pen.

For contrast, I used curves and set the blend mode to luminosity so as to help prevent colour change. I also created luminosity masks to alter the contrast of highlights, mid tones, and shows.

Other than some basic contrast adjustments thought the image, I slightly desaturated the sky and adjusted the hue to be a darker blue, followed by a slight increase is saturation in the sand.

Finally, I added the motion blur and kept it to the background not by adding a mask (as this would allow the edges of the subject to bleed) but by selecting the subject and copying it. I then added the motion blue to the entire image and pasted the subject back.

So simple Unsharp Mask was used to sharpen the subject slightly and I arrived at the final product.

Generally speaking, I am not a lover of Photoshop. I think its overuse and in some cases poor execution destroy the images taken. However, if I have the time and I can be bothered, I do like to play around in it - just so long as it can be done within 30min or so. In fact, this image only took me ~25min to complete. 

I use Photoshop as an enhancing tool - not to polish a turd so to speak! 

This image could stand up by itself, but I will admit that a little magic in PS can make it shine just that little bit more!

If you have any questions about how I did this, please do not hesitate to contact me!

Keep shooting!