Since this is a "learn React" thread, I'll point to my standard suggested resources for learning React [0], and my React/Redux links list [1]. More aimed at the self-learners out there who learn from blog posts and articles than courses, but the links list especially has a ton of info on React concepts and best practices.
Also, the Reactiflux chat channels on Discord [2] are a great place to get help and learn. We've always got a bunch of people hanging out happy to answer questions. Come on by and join us!