Execution gets divided into two key questions: 1) can you figure out what to do and 2) can you get it done.

So it's worth some real up front time to think through the long term value and the defensibility of the business.

Some day everyone will find out everyone else's comp, if it's all over the place, it will be a complete meltdown disaster

... the thing we see wrong with YC apps most frequently, is that people have not thought about the market first and what people want first.

One of the biggest advantages that start ups have is execution speed and you have to have this relentless operating rhythm.

Obsess about the quality of the product.

One of the keys to focus, and why I said cofounders that aren't friends really struggle, is that you can't be focused without good communication.