Dear men: You need to go beyond "supporting women" and "being an ally." You need to champion women. Hire women. Promote women.
If you're sitting in an office that's 80 percent male at the upper levels, you are not championing women enough. I'm sick of hiring nice guys say 'I don't do the hiring.' If all the guys who 'don't do the hiring' got together and approach the guy who DOES do the hiring and said, 'We need more women in this office,' THAT is championing women.
Staying silent when the boss is a sexist and/or racist doesn't make YOU a sexist and/or racist jerk. But it does make you complicit. Use your voice. Make some noise.
And if you're worried about 'rocking the boat,' that means you're ON the boat. Women just want to get on that boat, too.