Angela and Joel Solomon enjoy their new downsized home.

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In their new downtown lives, Angela says that she and Joel "walk almost everywhere." The two also enjoy a luxury they didn't have uptown—outdoor space, in the form of a terrace overlooking Washington Square Park and one of the city's last charming mews. "They are lively," Angela says of the New York University students in the storied park, "and the view will always be here."

She's true to Robert's mantra for moving with a good mind-set. "Focus on where you're going and what you're creating, not on what you're leaving behind," he says. "It's not about less; it's about different. And once you get there, everything shifts in your life, often in marvelous ways."