Reducing the number of clicks is a misguided metric. A process with eight trivially easy clicks is better than one with two fraught, confusing decisions. Each decision burns cognitive energy and risks making the user feel stupid. The ultimate design goal should be to prevent users from having to think.

Blippar's sophisticated image recognition was 'too clever' for mass adoption. The 'ugly as sin' but visually obvious QR code ultimately won because its function was immediately clear to users. This proves that intuitive, simple design is more critical for user behavior change than technological superiority.

The downvote is often seen as a negative feature. However, Reddit's CEO realized it's the primary tool for a community to define what doesn't belong. A community cannot have a culture without boundaries, and the downvote is the mechanism that enforces those boundaries, creating a shared identity.

The principle of universal design argues that solving for extreme use cases uncovers fundamental problems that benefit all users. Curb cuts made for wheelchairs help people with strollers, and lighter body armor designed for female soldiers proved superior for many male soldiers.

When designing for an incredibly wide user base like Safari's, designers must immediately disregard their personal usage patterns. Decisions can't be based on what's 'better' for one type of user but must navigate a complex matrix of all possible use cases, even conflicting ones.

Most open-source projects solve well-defined problems. A unique approach is to tackle subjective, aesthetic problems (like drawing "perfect" arrows) where no single right answer exists. By providing an opinionated, "tasteful" solution, you create value that others lack the time or specific expertise to develop themselves.

Instead of generic icons, use hyper-descriptive ones that visually tell a story (e.g., an icon for "5-star reviews" shows a finger clicking a star). These communicate benefits more effectively to users who skim content, likely increasing conversion.

Claude Design overcomes a non-designer's inability to articulate specific feedback by offering multiple distinct variations upfront. This smart feature shifts the interaction model from iterative prompting ('make it better') to direct selection, dramatically accelerating the design cycle for those without a design vocabulary.

Products like a joystick possess strong "affordance"—their design inherently communicates how they should be used. This intuitive quality, where a user can just "grok" it, is a key principle of effective design often missing in modern interfaces like touchscreens, which require learned behavior.