When I think of who some of the all-around, most successful businesspeople in the real estate industry, I think of Linda & Jim McKissack. Not only have they built an incredibly successful real estate team, but they also built it to run without them involved in the day-to-day business. They have created many other sources of revenue in their lives so that they are no longer reliant on the real estate sales income. And they've succeeded at partnering in business with people who are also lifelong friends.
How did they do it? First and foremost, they walk their talk. Spend a few minutes with either one of them, and you'll witness first hand their passion for leading a quality life and encouraging others to do the same. They're smart businesspeople, and they're full of integrity.
Their book, Presentation Mastery for REALTORS, does a great job of laying out what they've focused on in order to create a sustainable, ongoing successful real estate practice. If you're a new agent, it's a great blueprint. If you're a seasoned agent, you'll find yourself saying, "Oh yeah, I'd forgotten about that," or even, "I'd heard that before and I'm ready to do it now."
I recommend you pick up a copy and read it.