1. Give money to organizations that are doing the work you want to support 2. Get your company to give money 3. Speak out when you see sexism 4. When you are

1. Give money to organizations that are doing the work you want to support 2. Get your company to give money 3. Speak out when you see sexism 4. When you are hiring, specifically reach out to women tech organizations (I have a women's college in my town with a CS dept -- I made friends with the Dean and some profs -- I send intern and job openings to them) I think that there's work that you can do to increase the number of women applicants, so I do it. By the way, these things help to increase diversity along other dimensions, which you should also do.