Duplicate the image onto a new layer (keep it on top of the original layer)and play with various the filters in your graphic program eg; in PS: neon glow, find egdes etc or even by making a selection/s and then applying a layer effect eg; drop shadow, bevel etc
Once you have something you want to test out on your original then control it's influence with the layer blending effects: eg in PS the drop the little pull down window that shows the word 'Normal'and try - overlay, multiply and also play with the opacity of that layer for further control
Here is an example: the first image was the original, I then made a duplicate of that image onto a new layer, then I applied a neon glow - (remember you can experiment with anything desaturate, invert etc) and then I blended that with an "overlay" layer blending effect.
See how it the third image was influenced.



Anyways I hope this might demistfy some of the possiblities open to your photography
Kind Regards
Sean
