Successful window displays from a Feng Shui perspective include arresting light, color, movement and if possible, the presence of the 5 Elements (earth, water, fire, metal and wood).
Also, please make sure that the window is in alignment with your overall branding.
Here are some more examples (don't forget to check out part 1, as well!)
Remember to change out the display often to keep the energy fresh and exciting for your customers.
This one is from Tiffany and Company
Crystals are fabulous for catching the light--use clear or colored 40-50mm round Swarovski crystal spheres (you can order from me, if you wish--just pop me a note at info@10KBlessingsFengShui.com).
This display, again by Tiffany and Co. Note the moving water fall!