To prevent failure and make our designs more resilient, we need to explore edge cases and exceptions already during the design process. Let’s take a closer look at what to watch out for.

In a distracted environment, the best form of smartphone interaction is a high-speed, easy-to-use one. Luke calls the typical mobile usage a "one thumb, one eyeball" experience, since the highly distracted environment causes most mobile users to engage in one-handed use with short spans of partial attention.

User interface design is hard. With so many options to choose from regarding layout, spacing, typography, and colour, making design decisions can be overwhelming. When you add usability, accessibility, and psychology to the mix, it gets even harder. Luckily, UI design doesn’t have to be so hard.