Building the right thing for real people.https://penluma.com/https://penluma.com/blog/product-sense-empathy/01-how-to-use-this-guide/https://penluma.com/blog/product-sense-empathy/01-how-to-use-this-guide/Learn product sense and user empathy so the things you build feel obvious, not just functional. A practical guide for builders who want fewer confused users.Sun, 21 Jun 2026 00:00:00 GMTProduct Sense & Empathyhttps://penluma.com/blog/product-sense-empathy/02-what-product-sense-really-is/https://penluma.com/blog/product-sense-empathy/02-what-product-sense-really-is/Product sense is the reliable instinct for what to build and why it will matter. Here is what it really means, why it is learnable, and how to grow it.Sun, 21 Jun 2026 00:00:00 GMTProduct Sense & Empathyhttps://penluma.com/blog/product-sense-empathy/03-user-empathy-seeing-through-the-user-s-eyes/https://penluma.com/blog/product-sense-empathy/03-user-empathy-seeing-through-the-user-s-eyes/User empathy is the skill of seeing your product through the user's eyes. Learn why your own expertise destroys it and how to rebuild it on purpose.Sun, 21 Jun 2026 00:00:00 GMTProduct Sense & Empathyhttps://penluma.com/blog/product-sense-empathy/04-jobs-to-be-done-people-hire-products-to-make-progress/https://penluma.com/blog/product-sense-empathy/04-jobs-to-be-done-people-hire-products-to-make-progress/Jobs To Be Done explains why people don't want your product, they want progress. Learn JTBD, the milkshake story, and the four forces behind every switch.Sun, 21 Jun 2026 00:00:00 GMTProduct Sense & Empathyhttps://penluma.com/blog/product-sense-empathy/05-the-psychology-of-obvious-affordances-signifiers-mental-models/https://penluma.com/blog/product-sense-empathy/05-the-psychology-of-obvious-affordances-signifiers-mental-models/Some products feel obvious the moment you touch them. Learn how affordances, signifiers, and mental models make design feel effortless instead of confusing.Sun, 21 Jun 2026 00:00:00 GMTProduct Sense & Empathyhttps://penluma.com/blog/product-sense-empathy/06-closing-the-gulfs-action-feedback-the-seven-stages/https://penluma.com/blog/product-sense-empathy/06-closing-the-gulfs-action-feedback-the-seven-stages/Your code works, but users still call it broken. Learn Don Norman's two gulfs and seven stages of action to find exactly where a screen confuses people.Sun, 21 Jun 2026 00:00:00 GMTProduct Sense & Empathyhttps://penluma.com/blog/product-sense-empathy/07-cognitive-load-why-simple-feels-effortless/https://penluma.com/blog/product-sense-empathy/07-cognitive-load-why-simple-feels-effortless/Cognitive load is the hidden reason some screens feel effortless and others make you quit. Learn the laws behind it and how to design for a tiny memory.Sun, 21 Jun 2026 00:00:00 GMTProduct Sense & Empathyhttps://penluma.com/blog/product-sense-empathy/08-the-make-it-obvious-toolkit-defaults-constraints-discoverability/https://penluma.com/blog/product-sense-empathy/08-the-make-it-obvious-toolkit-defaults-constraints-discoverability/Most "user errors" are really design failures. Learn how smart defaults, constraints, and discoverability make the right action the obvious one.Sun, 21 Jun 2026 00:00:00 GMTProduct Sense & Empathyhttps://penluma.com/blog/product-sense-empathy/09-reducing-friction-flows-steps-progressive-disclosure/https://penluma.com/blog/product-sense-empathy/09-reducing-friction-flows-steps-progressive-disclosure/Learn how reducing friction with fewer steps, smart defaults, and progressive disclosure shortens the path to value and gets more people to finish.Sun, 21 Jun 2026 00:00:00 GMTProduct Sense & Empathyhttps://penluma.com/blog/product-sense-empathy/10-evaluating-usability-nielsen-rsquo-s-10-heuristics/https://penluma.com/blog/product-sense-empathy/10-evaluating-usability-nielsen-rsquo-s-10-heuristics/Learn Nielsen's 10 usability heuristics in plain language and use them to catch costly interface problems early, cheaply, and without recruiting a single user.Sun, 21 Jun 2026 00:00:00 GMTProduct Sense & Empathyhttps://penluma.com/blog/product-sense-empathy/11-emotional-design-delight-making-products-people-love/https://penluma.com/blog/product-sense-empathy/11-emotional-design-delight-making-products-people-love/Emotional design is why people remember and recommend products. Learn Norman's three levels, the peak-end rule, and how to design real delight that lasts.Sun, 21 Jun 2026 00:00:00 GMTProduct Sense & Empathyhttps://penluma.com/blog/product-sense-empathy/12-how-great-products-make-hard-things-obvious-teardowns/https://penluma.com/blog/product-sense-empathy/12-how-great-products-make-hard-things-obvious-teardowns/Great products feel obvious because designers absorb the hard work first. See 8 teardowns of Google, iPhone, Stripe, and more to learn the repeatable recipe.Sun, 21 Jun 2026 00:00:00 GMTProduct Sense & Empathyhttps://penluma.com/blog/product-sense-empathy/13-doing-user-research-interviews-the-mom-test-observation/https://penluma.com/blog/product-sense-empathy/13-doing-user-research-interviews-the-mom-test-observation/Learn user research the easy way: use The Mom Test to interview people without bias, watch users instead of asking, and turn real behavior into better products.Sun, 21 Jun 2026 00:00:00 GMTProduct Sense & Empathyhttps://penluma.com/blog/product-sense-empathy/14-sharpening-product-sense-deliberately-a-practice-system/https://penluma.com/blog/product-sense-empathy/14-sharpening-product-sense-deliberately-a-practice-system/Product sense isn't a gift you're born with. Learn how to build product sense with a simple weekly practice system that compounds your intuition over time.Sun, 21 Jun 2026 00:00:00 GMTProduct Sense & Empathyhttps://penluma.com/blog/product-sense-empathy/15-common-mistakes-anti-patterns-pitfalls/https://penluma.com/blog/product-sense-empathy/15-common-mistakes-anti-patterns-pitfalls/Most bad software dies by a thousand small cuts, not one blunder. Learn the UX anti-patterns and design mistakes that erode trust, and how to fix each.Sun, 21 Jun 2026 00:00:00 GMTProduct Sense & Empathyhttps://penluma.com/blog/product-sense-empathy/16-glossary-of-terms/https://penluma.com/blog/product-sense-empathy/16-glossary-of-terms/A plain-language glossary of product sense and UX terms - affordances, mental models, Hick's Law, cognitive load, and more - explained with real examples.Sun, 21 Jun 2026 00:00:00 GMTProduct Sense & Empathyhttps://penluma.com/blog/product-sense-empathy/17-frequently-asked-questions/https://penluma.com/blog/product-sense-empathy/17-frequently-asked-questions/Is product sense something you're born with, or can you learn it? Honest answers about empathy, UX, and the skill behind products people love.Sun, 21 Jun 2026 00:00:00 GMTProduct Sense & Empathyhttps://penluma.com/blog/product-sense-empathy/18-revision-cheat-sheet/https://penluma.com/blog/product-sense-empathy/18-revision-cheat-sheet/A fast, scannable UX cheat sheet of the laws, heuristics, and checks to run before you ship any screen - so users find it, read it, and know it worked.Sun, 21 Jun 2026 00:00:00 GMTProduct Sense & Empathy