In the US... Who to vote for!!! LOL
Just because you are nice to someone, it does not mean they will be nice back.
When to keep their mouth shut for one ! For some, to keep their foot out of their mouth. Just sometimes....silence is golden.
Diplomacy is usually better than violence.
Learn to laugh at yourself.
That you are not (metaphorically) the centre of the universe, and every rule that applies to other people also applies to you
Taking responsibility. It's always someone's else's fault.
Life.
That they could be wrong.