Every year brings new mistakes. In 2002, several of the worst mistakes in Web design related to poor email integration. The number one mistake, however, was lack of pricing information, followed by overly literal search engines.| Nielsen Norman Group
Better to accept a wider margin of error in usability metrics than to spend the entire budget learning too few things with extreme precision.| Nielsen Norman Group
The 10 most egregious UX offenses against users. Web design disasters and HTML horrors are legion, though many usability atrocities are less common than they used to be.| Nielsen Norman Group
Even the tiniest amount of empirical facts (say, observing 2 users) vastly improves the probability of making correct UI design decisions.| Nielsen Norman Group