10 Principles of Good Design (1) Good design is innovative. (2) Good design makes a product useful. (3) Good design is aesthetic. (4) Good design makes a product understandable. (5) Good design is honest. (6) Good design is unobtrusive. (7) Good design is long-lasting. (8) Good design is through down to the last detail. (9) Good design is environmentally friendly. (10) Good design is as little design as possible.