I learned that the moment you want to slow down is the moment you should accelerate.

You need a stubborn belief in an idea in order to see it realised.

Cordless vacuums are designed for quick jobs, but you need enough power to do the job; you don't want the power waning over time.

Hire inexperience. This year we plan to hire 200 engineers - half of whom are recent grads. Young people are not burdened by years of experience. They haven't learned - or been told - what is right or wrong. With engineering, there is no tried and tested path. You try, and fail, and fix, and fail again.

In the digital age of "overnight" success stories such as Facebook, the hard slog is easily overlooked.

One of the most fun inventions of my lifetime is the Mini.

Far too few designers put any thought into usability, ending up with a great product that's completely inaccessible.