How to Start a Startup series
As you can imagine, most of the business ideas and young startups are tech and software. However, I think you'll find a lot of value no matter what your niche. For example, in this lecture Alex Schultz, VP of Growth of Facebook, shares good insight on customer retention, customer "magic moments" that drive growth, why you should not focus on your top customers to achieve massive growth, and more.
http://startupclass.samaltman.com/courses/lec06/