To know when you can help, and when you cannot help. We talk a bit about that in the regular retreat as well. In the scriptures, the Buddha also talked about when we can help, and when we cannot help. In that section he did mention how is it going to relate to us? In the sense of, "Yes, it might be difficult, but can we see positive results coming from it?" That's going to be the key. If our thoughts are centered around wishing to help, yet we see, "Ooh, this is going to be complicated, this is going to be awkward for me." Is the awkwardness just (it's translated in the scriptures as) "a mere trifle"? Is it just little, compared to the benefit that could come to the other person if we help them solve whatever problem they're creating?
When your thoughts center more on the benefits that may come for the other person, for anyone else involved, and if you put it into perspective, "It's only a little bother for me, compared to what it could be". Then that can help motivate you to go ahead and say something to someone, if you think you can solve the problem.
Yesterday I mentioned the "eight worldly dhammas". If we focus too much on, "They're going to blame me"; "They're going to hate me", etc., if we focus too much on that, then all of our focus is on "me, me, me"; "my little world", whether I'm liked or not.
When we focus on the benefit for other people, it gives us more courage. When we focus on "me, me, me; I'm going to get blamed," we have more fear. So, in trying to solve a conflict skillfully, that's another aspect. Not only the Compassion/Lovingkindness, but we need a little bit of courage to step into an unpleasant situation. And this involves having more Equanimity with the eight worldly dhammas.