Ideas by themselves are not worth anything, only executing well is what creates value.

Every company has a rocky beginning.

... for the top twenty most valuable YC companies, all of them have at least two founders.

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

For most of the early hires you make in a startup, experience doesn't matter very much, and you should go for aptitude.

Be suspicious of any work that is not building product or getting customers.

Wait to start a startup until you come up with an idea that you feel compelled to explore.