The Golden Ratio is approximately 1.6180339887. This number is the basic ratio of making stuff look good. It can be in Type, Buildings, Products, but most importantly its constantly seen in nature. When creating a product, I would recommend thinking about the golden ratio and how you could use it to complement the form.
As part of a second year university module I applied the Golden Ratio to my class mates faces. You can see the results bellow, I have also included my own Layered TIFF with Overlay, So you see how beautiful you are.