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

We need to encourage investors to invest in high-technology startups.

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.

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.

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.

Don't listen to experts.

There's nothing wrong with things taking time.