http://en.wikipedia.org/wiki/Design_...and_principles
[edit] Principles of design
There are several principles of design that are as variable as are attitudes regarding modern design. They differ both between the schools of thought that influence design and between individual practicing designers. The principles of design consist of- repetition, gradation, rhythm, radiation, contrast, dominance, proportion, scale, balance, harmony and unity. Some of which overlap in design. The principles are used in all visual design fields such as graphic design, industrial design, architecture and fine art. The principles govern the relationships of the elements used and organize the composition as a whole. Successful design incorporates the use of the principles and elements to serve the designer's purpose and visual goals. There is no rule for their use, but may be directed by intent. The designer's purpose drives the decisions made to achieve appropriate scale and good proportion, as well as the degree of harmony between all the elements achieved through the sensitive balance of variety and unity. These concepts and elements drive all intentional design strategies. Awareness of the elements and principles is the first step in creating successful visual compositions
The principles of design consist of-
repetition,
gradation,
rhythm,
radiation,
contrast,
dominance,
proportion,
scale,
balance,
harmony
unity.
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I think above items could be rearranged.