VISIT CNBC.COMX Careers Careers'Shark Tank' investor Robert Herjavec shares the best advice Mark Cuban gave him Marguerite Ward | @forwardist 1 Hour Ago CNBC.com John Lamparski | Getty Images Mark Cuban SHARES Robert Herjavec and Mark Cuban, both judges on ABC's "Shark Tank," haven't always seen eye-to-eye. Herjavec, the multi-millionaire owner of...