One of the happiest, most successful executives we know is a woman named Deb. She works at a major technology company and runs a global business unit that has more than 7,000 employees. When you ask her how she rose to the top and why she enjoys her job, her answer is simple: people. She points to her boss, the CEO, a mentor who “always has her back”; Steve, the head of a complementary business, with whom she has monthly brainstorming lunches and occasional gripe sessions; and Tom, a protégé to whom she has delegated responsibility for a large portion of her division. Outside the company, Deb’s circle includes her counterparts in three strategic partnerships, who inspire her with new ideas; Sheila, a former colleague, now in a different industry, who gives her candid feedback; and her husband, Bob, an executive at a philanthropic organization. She also has close relationships with her fellow volunteers in a program for at-risk high school students and the members of her tennis group and book club.

A version of this article appeared in the July–August 2011 issue of Harvard Business Review.