I have been part of Y Combinator’s Startup School, and so far had graduated two ideas out of it. It is a really useful and informative, and keeps you on your toes if you are starting up.
“Over the past 15 years, we’ve created many videos, podcasts and essays as resources for startup founders. We’ve now consolidated them here in the YC Startup Library.”
Visit the Y Combinator’s Startup Library.