Okay, first off, you're probably going to have to settle for images that look like a $1.99; a million might be just a tad optimistic!
As for what you do technically; well her dress is somewhat blown out on the back and the use of a couple of external lights and/or reflectors would have helped to reduce that. The ground is less than interesting; perhaps look for something a little more photogenic? Cobblestone, brick, or something with more attractive colours.
I really like the concept of this image, and shooting something like this without getting your own shadow in it is tough. Pose-wise, I think I would have had her right hand on the ground so that her fingers were touching her shadow-fingers. A bit cliche yes, but I think it might have made a stronger image.
That's about all I've got. I'm sure others will have some good suggestions.
~John