One thing I see a lot of in editorial style fashion is the use of a single soft light source, especially with a grey background, so trying to replicate that look was a starting point for me. I usually have a pretty fluid workflow, tweaking as I go towards the image in my head, so there's not really a defined step-by-step process, but I'll try to explain what I did:
-New layer, softlight mode, radial white-black gradient a couple times until I got the size and placement I wanted to simulate the falloff from the imaginary softbox
-Warp new layer until shadow/highlight areas were believable, reduce opacity
-Create layer mask for softlight layer using the blue channel, mask out model
-Use same mask on new softlight layer, further darken shadows, de-emphasize model's shadow on background
-Hue/Saturation adjustment layer, -100 saturation, 37% opacity
-Darken with levels, use layer mask from before to mask out model, use black output slider in levels on the layer mask to bring back the model a bit
-Slight "S" curve for contrast
-D&B legs for more dynamic lighting
- Red, Green, and Blue Channel Mixers set to monochrome, 100%, in multiply, screen, and luminosity blending modes respectively, at 30% opacity for skin tone.
This was the image I had in my head- hope it has the "pop" you're looking for.