SAN FRANCISCO — Katie Maxwell knows a thing or two about being a successful agent. As the Managing Broker of Intero Real Estate Services, Katie oversees one of the fastest-growing real estate companies in Houston. “When selling myself in the past and working with the agents that I have to make as successful as possible, I know what it takes,” she said. “If you don’t have the groundwork or the foundation, you’re going to be out of luck.” A few off-the-bat tips Katie has for new agents include skipping the logo and staying off of Instagram when you’re supposed to be working. And don’t bother with a buyer book in 2016 — or later, for that matter. Behold, Katie Maxwell’s hour-by-hour schedule to be a successful agent. Starting the day right 6 a.m. — Wake…