Infinite Scrolling: When to Use It, When to Avoid It
a11y
10 Usability Heuristics for User Interface Design
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.
Overlay Overload: Competing Popups Are an Increasing Menace
Today’s users are overwhelmed by a plethora of site and browser-initiated popups with content unrelated to their current task.