His basic advice: have a "fuck it" attitude about everything. "Keep other people's opinions out of your creative process." Do it your way. Do what you love. Mess up...it's ok. He didn't think strategically, or follow all of the rules, or "master" social media. But he's still rockin it out big time now.
And though he didn't talk much about it, I would add: be original. Yeah, I know it's hard these days when everything has been done 8 million different ways till next Tuesday, but at least trrrrrry.