What I've learned from running is that the time to push hard is when you're hurting like crazy and you want to give up. Success is often just around the corner.

Failure is an enigma. You worry about it, and it teaches you something.

Everybody recognizes that if you can make very efficient electric motors, you can make a quantum leap forward.

Exactly 5,126 attempts to make the first bagless vacuum cleaner were failures-some catastrophic disappointments, some minor defects. It took 15 years. Prototype 5,127 was the success ... Failure is painful, but it spurs on improvement like nothing else.

Life is a mountain of solvable problems and I enjoy that.

It's the unlikely juxtaposition of creativity and logic which causes the wooliness and confusion around the term 'innovation'. Everybody wants to be innovative; many companies and ideas are proclaimed to be innovative and no one doubts that innovation is a money spinner. And, thus, we are all looking for the magic formula. Well, here you go: Creativity + Iterative Development = Innovation.

I've obviously used fans - I wouldn't say all my life, because we couldn't afford them when I was young, but from my 20s and onwards we've had to use fans. And I've always loathed them. Everything about them. The way you adjust them, getting them at the angle you want. Carrying them. Cleaning them. The danger of putting your finger in them.