I was watching the beginning of Bang Bang Con (!!Con) and they talked about their code of conduct. I liked these three tips they gave to stay in line with their values:

“Avoid feigning surprise.” When someone says something like “I’ve never heard that you can do <b>x</b>,” instead of replying “You’ve never heard that?!” take a moment to revel in the fact the person is about to learn something new and cool. Let that frame your response.
Avoid “well, actually...” if someone says something not quite correct.
Avoid subtle -isms like “so easy my grandmother could do it.” That’s a subtle exclusion of women and older people.

Edit: these are based on the Recurse Center’s social rules.