One line of thought goes: follow a tradition, pass on only what is handed to you, none of your own ideas. Be as faithful to the tradition as you can. If there is something you have an alternative opinion on rather say nothing. There is licence to speak about the abstract ideas of others' minds. You can say what you don't understand as long as it has precedence in your tradition.
"So and so says such and such." Act kind, abundant, authentic and committed.
Another could be: follow only what you experience for yourself. Don't give people books you haven't read, don't even place them with books you have. Don't send people hyperlinks you haven't explored, don't express opinions on subjects you aren't familiar with from first-hand experience - even if you have great faith in the source of those opinions - even if you site your sources. Who pays attention to sources anyway? For most, what we remember, if anything, is that it came from you. Don't give directions to places you haven't been, instead, if you must, recommend a map-book you've personally used. Don't speak ideas to people unfamiliar with them. Don't say what you don't understand.
"I say such." Be disciplined, reserved, genuine and pure.
People will know nothing and everything
Remember nothing and everything
Think nothing and everything
Do nothing and everything
- Machig Labdron