The Golden Ratio or Golden Mean was first mentioned by Euclid and based on the Fibonacci sequence of numbers and found all throughout nature. It is the secret proportion to all things. The God Equation if you will. It has been used in Art and Design since as far back as the pyramids. Why? Because everything looks great when you use it! Today in the modern world it is rarely taught for some reason. As the saying goes, “there is an app for everything” and now you can use this app on your Iphone to make a really well composed picture. If you like to draw and you have 8 minutes, listen to this guy who teaches you what you will need to know. Don’t like the Golden Mean? Try the Rule of Thirds.
***There is also a program that overlays the golden ration onto any program you work in: http://www.phimatrix.com/viewdemo.htm