- “Client maintenance required checking in with them as regularly as possible and returning their phone calls by the end of the day regardless of how trivial their concerns might appear. When clients of mine ran into each other and one asked, “Have you talked to Leigh lately?” I wanted to be certain the answer was always yes.” The Agent: My 40-Year Career Making Deals and Changing the Game (Steinberg, Leigh;Arkush, Michael)–page 91