In my world, kindness begets kindness. I don't think about it, it comes naturally, so these fishes are flying across land and sea and more land to one of the nicest people I know who has shown me nothing but kindness. And kindness can be just a note saying: How are you?
My challenge (and it's getting easier) is not to react to negative things. For example, I will not let meanness beget meanness. Not in my world, anyway. That doesn't mean I always ignore it; sometimes you have to state your case, but do it calmly and clearly, and then walk away. Happily, this is happening less and less in my life, and for that I am grateful.