I learned how to deconstruct constructive communication. Seeing it broken down into five steps (clarify, acknowledge/validate, express feelings, find common ground, offer solution) makes it much easier to move through the process of working through a problem with another person. I especially like the part where it said we don't want to leave the other person feeling defeated.
I took this Language, Culture, and Cognition class my final semester in college. There was a segment of the class where we were talking about how people typically describe arguments, such as "Argument is War." When we think of an argument as a war, one person has to win and one has to lose, which this module says we want to avoid if we are smart. If we were to think about argument as a dance or an opportunity to come to understanding, it would change how we approach it and prevents the relationship from being damaged in the long run.