A good example of how happened a couple days back. I was discussing a person I know who is doing foolish things and I said 'I don't get it, because she's a smart woman'-- then paused, shook my head, and said 'I'm sorry. I don't get it because she's a smart person: her gender's irrelevant to the question'.
While it's not an example of me being perfectly proper about sexist use of language, it's at least a good example of me noticing the sexism implicit in the language I used, and navigating around it.