Don't have arguments with people who aren't present

One of the main causes of trouble in relationships is having conversations with people in our heads and thinking they have anything to do with a real conversation. In relationships, there are often four versions of each person: the actual person, the version we carry around in our heads, and the version of us they carry around in their heads. To improve relationships, a simple trick is to never have an argument with someone who isn't physically there. When we argue with someone who isn't present, we're actually arguing with ourselves and blaming it on them. By eliminating arguments with absent individuals, we can have a different and more accurate experience of the actual person, leading to less resentment and built-up angst.