answer:I think what you (as a specific person) has a lot to do with who you are (male, female, other) and where you are (entry level, educated but with no management power, middle management, owner, etc) in the tech industry. If you’re lower on the power hierarchy, you can listen to women’s stories and not be dismissive. You can find out what women find to be bothersome, like in Lighten Up and this Tumblr post, and then make a conscious effort to not be a part of those things, to not tell women to “lighten up” and be dismissive. You can be an understanding ear for women going through those things to vent to, who won’t just reinforce sexism, benevolent or hostile. You can point out sexism when you see it, being an ally to women when they point it out, calling others on their crap, and generally agreeing that this is bs and the tech industry can do better. When talking about something that’s problematic, you can specifically point out that sexist component that’s problematic – not just, poor management, but, sexist management. If you’re higher up, you can hire women. You can let it be known in your position as the supervisor or boss that others making sexist comments, doing sexist things, being generally more critical of women, etc will not be tolerated, and make an effort to make your space a safe space. You can point to companies/policies/specific actions that were awesome and helpful, so you’re not just pointing out problems but also pointing out solutions. Giving people models to follow really helps. You can redirect people’s attention even when sexism isn’t really the question (eg, “omg, did you guys here about this totally awesome thing that just so happens to be diverse over the weekend? Let’s talk about it. Also, I really loved how diverse they are, in x, y, and z ways! We should have more of that!”) so that they’re going outside their comfort zone and realizing how awesome Not Sexist can be. You can refuse to buy products that are sexist, or made by a really sexist company, and then make a point to buy stuff that isn’t sexist or is made by non-sexists, so that the message isn’t just “not buying” but “not buying because sexism”.