No matter what you choose, build stuff and be around smart people.

You need conviction in your own beliefs, and the willingness to ignore others naysaying.

Firing people is one of the worst parts of running a company. Actually in my own experience, I think it is the worst.

Most great companies in tech have been built by personal referrals for the first...at least 100 employees and often many more.

Investors will sort of like write the check and then, despite a lot of promises, don't usually do that much; sometimes they do.

Good startups usually take 10 years.

You need to figure out what the 2 or 3 most important things are, and then just do those.