Y Combinator is a startup accelerator. They’ve helped launch over 2000 companies, including Stripe, Airbnb, Dropbox and Twitch. All combined, the valuation of the top YC companies is more than $150 billion 💰💰💰
Oh, and they teach a lot of their best stuff for free via the YC Startup School.
Here’s the curriculum. 30 lessons total, about half are video.