Specifically, which Blogs/Books/Speakers/Experts have the leading ideas and most helpful material on how to improve the scalability of a company. This question is not limited to startups, but any growth oriented company. Let's assume the company has achieved product/market fit ... now what? What are the leading ideas or principles for scaling, and who has them?
Here's my list of people who've actually built and scaled companies.
Todd Tzeng - Turn around artist of big and meaningful companies.
Cameron Herold - Built 1-800-GOT-JUNK from 5M -> 100M+ in 7 years.
Built and few a company to IPO and now works with growth oriented founders to help them
Ken Leblanc - Started and scaled propertyguys.com to 100's of franchises and category leader