The popular saying "do what you love and the money will come" has never rung truer. Recently Kim Kardashian West revealed the one rule that she and her sisters follow for success. We would actually like to call it the best business practices. Truthfully, who would not want to take business advice from the Kardashian-Jenner Klan? Kim especially. She now runs several businesses including her latest shapewear line SKIMS and her perfume line KKW Fragrance that she has partnered with her sisters to do.