Julie Chen has mastered the art of negotiating ... she knows the first and most important rule for women -- and for that matter, men -- when they're not getting what they want from their boss.
Julie was leaving Craig's in WeHo Thursday night when we asked her about Kellyanne Conway's take on equal pay for women. Julie laughed ... then gave advice surely embraced and followed by hubby Les Moonves ... the cardinal rule in negotiating salary or anything else for that matter.