What is your "One Thing"?

[Zac Tiburzi]

Hey guys! I just got my realtor license and I'm trying to build a flipping business in South Florida. I just got finished reading " The One Thing" by Gary Keller and am struggling to figure it out. I was wondering for all the flippers out there or just anyone who is building a real estate investment company.. ( if you've read the book and understand the concept) What was your" one thing" that brought you success in the beginning? Thanks!