We talk to a team they've gotten new things done, that's the best predictor we have that a company will be successful.

If it works out, you're going to be working on this for 10 years.

When lack of structure fails, it fails all at once. What works totally fine from 0-20 employees, is disastrous at 30.

Stay focused and don't try to do too many things at once. Care about execution quality.

If someone is choosing between joining McKinsey or your startup it's very unlikely they're going to work out at the startup.

If you're not in college and you don't know a cofounder, the next best thing I think is to go work at an interesting company.

So if you want a culture where people work hard, & pay attention to detail, focus on the customer, are frugal: you have to do it yourself.