If anyone thinks they'd rather be in a different part of history, they're probably not a very good student of history. Life sucked in the old days. People knew very little, and you were likely to die at a young age of some horrible disease. You'd probably have no teeth by now. It would be particularly awful if you were a woman.

I think that's the single best piece of advice: constantly think about how you could be doing things better and questioning yourself.

Constantly seek criticism. A well thought out critique of what you're doing is as valuable as gold

I don't think it's a good idea to plan to sell a company.

The tough thing is figuring out what questions to ask, but […] once you do that, the rest is really easy.

One bit of advice: it is important to view knowledge as sort of a semantic tree - make sure you understand the fundamental principles, ie the trunk and big branches, before you get into the leaves/details or there is nothing for them to hang on to.

You want to be extra rigorous about making the best possible thing you can. Find everything that's wrong with it and fix it.