I don't entirely agree with this one. IMO it's better to learn to make your point(s) correctly and concisely, and if possible with authority, but also periodica

I don't entirely agree with this one. IMO it's better to learn to make your point(s) correctly and concisely, and if possible with authority, but also periodically check yourself to see if the matter is worth arguing about and that you're not just repeating yourself. Sometimes it's better to just disengage, especially when the stakes are low (at social events rather than work).