Do the exercise where you look into the other person's eyes for 10 minutes by the clock, that's a fun social skills building exercise that brings you closer to the person you do it with.
Do pre-mortems of things. I.e. supposing we're 5 years in the future and we look back at the problems we had, what do we expect those problems to have been? Can we change them?
If it's worth saying, but not worth its own post, then it goes here.
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