Disabled buttons often confuse users by appearing clickable but providing no response or feedback. Designers should use them sparingly, ensure they’re accessible, and clearly explain why the button is disabled.
Fitts's Law describes how long time it takes to click a target, based on the distance to the target and its size. Use this information to make buttons and links faster to click.
Sliding hero images that rotate through a set of promotions, news, or the like on the top of web pages are often annoying to users and are definitely error prone, unless they are designed according to usability guidelines.
