Word of mouth works now, much more than ever. @-reply every single person.
Whether you're 9 or 90, stop trying to fix the things you're bad at, and focus on the things you're good at.
I think of customer service as an offense and not a defense
I love people, and the hustle.
Know the philosophy, know the details, and ignore everything in the middle.
Stop doing things that waste time. Don't replace time with your family or things that you need to do. I needed to put together two fantasy teams this weekend because that's something I enjoy, but I did stop playing Nintendo Wii for hours on end.