8. Von Restorff Effect 8/20

It is also called the effect of isolation, which means that among similar objects, the user will remember the one that differs from the rest. Therefore, it is recommended to visually separate important information or an important object.

9. Pareto Principle 9/20

Many people know the law that states that 20% of the effort give 80% of the result, and the remaining 80% of the effort provide only 20% of the result. Therefore, it is recommended to focus your efforts on those areas that will bring maximum benefit to the majority of users of the interface first. Let“s take navigation in an application, for example. 20% of the functions of the application are usually located in navigation tabs, which occupy 80% of the user's time spent in this application. In other words, these very 20% are the most used functions.