Understanding and providing great service is foundational to building sustainable success in today's spas, salons, and shops. Lydia Sarfati, founder and president of skincare company Repechage, wrote the book "Success at Your Fingertips" in response to the many requests for advice she receives from professionals across the globe. One of the most successful women in the spa and salon industry, Lydia offers her very best advice in Part 2 of this 4-part series.