Learning to see waste and systematically eliminate it has allowed lean companies such as Toyota to dominate entire industries. Lean thinking defines value as 'providing benefit to the customer'; anything else is waste.

Entrepreneurs always pitch their idea as 'the X of Y', so this is going to be 'the Microsoft of food.' And yet disruptive innovations usually don't have that character. Most of the time, if something seems like a good idea, it probably isn't.

The problem with entrepreneurship is we are often working really hard producing high quality products that no-one wants. The creation of stuff is not valued.

The mistake isn't releasing something bad. The mistake is to launch it and get PR people involved. You don't want people to start amping up expectations for an early version of your product. The best entrepreneurship happens in low-stakes environments where no one is paying attention, like Mark Zuckerberg's dorm room at Harvard.

Trump wants to be the first American tsar. With his hero worship of Putin, his admiration for the apparent omnipotence of the Kremlin, schoolboyish crush on Putin's gangster swagger and his contempt for democracy, Trump wants to rule with his family, taking decisions purely because he's right about everything like a tsar.

I come from a family of well-endowed booty women.

Seriously, who really cares how long the Nile river is, or who was the first to discover cheese? How is memorizing that ever going to help anyone? Instead, we need to give kids projects that allow them to exercise their minds and discover things for themselves.

My dad, who is a heart surgeon, works with many adult patients who did not take good care of their bodies in their formative years. He is able to teach them how to break old eating and exercise habits and reshape their bodies, but not without a great deal of resistance.