She says integrity is a nonnegotiable quality and has built a successful business around that credo.
As someone who works with a lot of first-time home buyers, Epstein knows it’s important to be available to her clients at any time of the day. "I don’t have a time where I turn off," she says. This D.C.–based condo specialist is always on the go in her Mini Cooper with her BlackBerry, iPad, and MacBook Air. "I’ll go the extra mile to keep my clients happy—by being responsive to their concerns and their 3 a.m. e-mails." Epstein even sold a house while on her way to the hospital for back surgery. Her advice: Even if you’re the top salesperson at your company, practice humility with your peers.