Here are some resources I recommend, organized by topic

Leadership

Books

Leadership and Self Deception. Focuses on defensiveness (which it calls being in the box).
Turn the Ship Around, by David Marquet. Emphasizes the importance of delegating authority (which he calls the leader-leader model instead of the leader-follower model.

Y Combinator Startup School 2012 and 2013. Twenty one ~30min videos on startups from founders including: Mark Zuckerberg (Facebook), Jack Dorsey (Twitter & Square), Joel Spolsky (StackOverflow), etc.
Lean Startup Conference 2012. Sixteen mixed-length videos (~5 to ~30min) on lean startup process and experiences from practitioners including: Marc Andreessen (Netscape, Andreessen Horowitz), Scott Cook (Intuit), etc.
Stanford Entrepreneurship Corner. A big collection of video-recorded talks at Stanford on a variety of topics, including: Creativity & Innovation, Opportunity Recognition, Team & Culture, etc.
Kauffman Founders School. A series of short videos (~5-10mins) on entrepreneurship (lean methodology, intellectual property, equity, etc).
Lean Day West Conference 2013. Seven awesome videos (~30-50mins) on Lean Startup and Lean UX in the enterprise.

The Startup Toolkit. A great collection of articles by Rob Fitzpatrick, Leancamp fellow and YC alum. Based in London.
Silicon Valley Product Group Archive. A great collection of articles by Marty Cagan, product management thought leader extraordinaire and author of Inspired: How To Create Products Customers Love (a must-read!).
50 Articles and Books that will Make you a Great Product Manager. A great set of links to articles and books on Product Management by Noah Weiss VP of Product Management at foursquare.

Google I/O Videos: 2013, 2012, 2011, 2010, etc. Awesome videos on various subjects including: Android, Chrome, Google Apps, Cloud, Maps, Knowledge & Structured Data and other Tech Talks.
PyCon 2014 Videos: Dozens of great talks on Python, Django, etc.