No, this is not about food :) this is an easy way to remember the four key elements that makes a good photo: Design, Information, Emotion and Timing.
Photographer Craig Semetko explains how he sees that DIET to have a huge impact on a photograph. One element out of the DIET is good, but having three or more, is almost always a guarantee for a great photo. Hit the jump for some examples:
Good luck with your DIET!