Whether it's Valentine's Day, Father's Day, a special sale, or you're simply trying to move old inventory, every good window display should be built around a theme and highlight your store's image.
Be especially sure to avoid cluttering the display. Accentuate products with the proper lighting, stock up on featured products, create a backdrop, and above all, be creative. If all this sounds like too much for you, consider turning the task over to a creative member of your staff. A final option is to outsource the job, but before you hire anyone, make sure to review a portfolio of their work and ask for references.
For more on customer window displays, be sure to read Tips for Creating Winning Window Displays.