Jakob Nielsen's 10 general principles for interaction design. They are called "heuristics" because they are broad rules of thumb and not specific usability guidelines.
Back in the late 1970s, Dieter Rams was becoming increasingly concerned by the state of the world around him — “an impenetrable confusion of forms, colours and noises.” Aware that he was a significant contributor to that world, he asked himself an important question: is my design good design?
