It's a confusing time for women who want to get ahead at work. "Pushy Women Don't Make it to the Top" screams one headline. Evidently, to get promoted women need to be "cheerful, self- confident, motherly". This has me searching through the cupboard for my apron. But no sooner have I knotted the ties than I read something completely different. "If you really want to be successful, you have to adopt a masculine approach of being pushy and dominant. In short, you have to walk on dead bodies," says the next survey. Right. Apron off. Armour on. Then comes yet another survey on the subject, by the Industrial Society. "The writing is on the wall for the macho managers," comments one …