Y Combinator Startup Library

Y Combinator has organized their old videos, podcasts and content in their new Startup Library. It's a great page to bookmark. You can find great advice from companies of all sizes here. "Over the last 15 years, "YC has invested in and worked with more than 2,000 companies, and we’ve seen and learned from their successes and failures. The library consolidates the knowledge and advice we’ve previously published and provides a central location for new content."