Who's pulling for you? Who's got your back? Who's putting your hat in the ring? Odds are this person is not a mentor but a sponsor. Mentors can build your self-esteem and provide a sounding board--but they're not your ticket to the top. If you're interested in fast-tracking your career, what you need is a sponsor--a senior-level champion who believes in your potential and is willing to advocate for you as you pursue that next raise or promotion.