Key takeaways
- Most innovation is done as an incremental enhancement of existing products.
- We accept human behavior as it is, not as we wish it to be.
- A design is easy to use when actions are visible and intuitive.
- User feedback should be immediate, whether it is working or not working.
- Never criticize without a better alternative.
- Approximate answers are often good enough.
- There is no human errors, there is only bad design.