A good idea turns every cog in your mind, making you scared of bed in case the whole machine grinds to a halt.

I'd work eighteen-hour stretches and fall asleep in my clothes. Then I'd wake up in the middle of the night, brew a pot of tea, and start work again. I was tired, but work had become pure enjoyment.

The notion that inventors are anorak-wearing crackpots with glasses held together with Sellotape is beguiling but wrong.

The key to success is to risk thinking unconventional thoughts. Convention is the enemy of progress.

But having had your bright, fresh, original idea, the really hard part is turning it into a successful product. That's what takes all the sweat.

A good idea turns every cog in your mind, making you scared of bed in case the whole machine grinds to a halt.

Do what gives you a buzz.