Just put a little pin in your mind: when you cross 50 employees, there are a new set of HR rules that you have to comply with.

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

You really want to know your cofounders for a while, ideally years.

Everyone starting a startup for the first time is scared, and everyone feels like a bit of an imposter.

If you can just learn to think about the market first, you will have a big leg up on most people starting startups.

Just put a little pin in your mind: when you cross 50 employees, there are a new set of HR rules that you have to comply with.

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