My absolute favorite way to learn new concepts is audiobooks. I listen while driving, working, or just relaxing. Since I started using Audible, I consistently complete about 2 books a month.
Small Business Books
Start-Up Books
Dealmaking and Negotiations
Deals and Negotiations
Rapport Building
Building Rapport for the introverted & beginners
Learn how to build rapport and trust with anyone anytime
The Hustle and Flow 