Sarah Nickerson is like any other career-driven supermom in Welmont, the affluent Boston suburb where she leads a hectic but charmed life with her husband Bob, faithful nanny, and three children—Lucy, Charlie, and nine-month-old Linus. Between recruiting the best and brightest minds as the vice president of human resources at Berkley Consulting; shuttling the kids to soccer, day care, and piano lessons; convincing her son’s teacher that he may not, in fact, have ADD; and making it home in time for dinner, it’s a wonder this over-scheduled, over-achieving Harvard graduate has time to breathe.