In the context of the author's experience:

>And you said it in front of their boss.

this advice:

> Talk less. > You don't need to share everything you know.

Makes a ton of sense. For a very tactful individual, "consider the audience" is good advice. But for the rest of us, it is often better to remain silent.

On this topic, the problem I have with "talk less" as advice is that although simply by 'talking less' you make room for silence and other people to fill it in, it doesn't actively instigate other people to talk. I want other people to pro-actively give their opinions and thoughts.

This is genuinely really good advice for some people, the only difficulty is making sure that it goes to the right people.