The document discusses key design principles including contrast, direction, balance, rhythm and repetition. It notes that when used together, these principles result in an organized and visually compelling design that effectively conveys information. It then provides additional considerations for effective design such as using space well, alignment of elements, organization of information, rhythm and repetition, target audiences, imagery, color, and fonts. The document stresses that fonts, colors and imagery can strongly impact a design's message and should be chosen carefully.