Lama Ole’s answer:
Against egotism it helps to see that all people are in the same situation as we are. They all want to be happy and avoid suffering. They behave well when they are doing well and become unpleasant when they’re having a bad time. So we can see that they are not so different from us.
And against stubbornness? The best is maybe to say “PEI!” Every time you are totally stuck in your own fixed ideas, you can quickly say “PEI!” inwardly. It’s like a pile of peas being hit by a stick; they fly everywhere. A sharp “PEI!” is very good. Then when the elements of your stubbornness condense again, say “PEI!” once more, and then maybe they’ll stay away.
If people take themselves too seriously, tickle them. Just be careful of where you are standing in relation to them, because if they are angry they might try to hit you with the back of their head. So duck down a bit to the side and tickle from there. And then say, “Aren’t you happy today?” And even though they’re taking themselves incredibly seriously, they’ll start to laugh.