In this second example, the first image is the default settings in Bridge, the second is after I tweaked in Bridge (minor adjustments to exposure, temperature, blacks, etc in Adobe Bridge) and the third is after Photoshop.

I knew I wanted the shot fairly saturated and high key so I do this "thing" (for lack of another word) where I duplicate the layer, add a high pass filter at 250px & then I open up my curves palette & click around on the image with the white point tool. Depending on where you click it'll give you a different tone, as well as bleaching out the skin. This may sound fairly primitive & haphazard but it works for me! I'll also add a fairly severe s-curve and after clicking ok, I'll often go to "edit" and "fade curves" just to bring it back a little.

Here's a screen shot in case anyone doesn't have a clue what I'm going on about!

As I'd originally made a duplicate layer, I can now add a layer mask to bring back some detail and sometimes I'll use different blending modes for the layer such as overlay to give a more contrasty/punchier effect. I hope this is making sense! Other than that I obviously retouched her skin, there's a slight vignette on this image, I worked on the eyes & used the dodge tool on her hair to emphasize the lighter strands and just did some final levels, contrast, curves & sharpening and that's about all I can remember!