Communication is a matter of interaction and understanding between two or more subjects of a verbal and non-verbal nature. This is the theoretical basis for interaction. But in practice, these 4 principles will come in handy.
1) The first and basic principle of communicating with people is the realization of a simple truth - criticism is useless! People are mostly not used to judging themselves, because life goes on and if you are condemning yourself personally, you can miss many memorable moments, immersed in your world. What can you do in order to somehow influence the behavior of friends and loved ones, if you do not use criticism? Everything is very simple! Instead of being judgmental, people should be encouraged to behave well. This can be done in a variety of ways, and all of them will work much better than any criticism.
2) The second principle that needs to be learned is how to correctly achieve the desired action from another person. The truth is simple - in order to persuade another person to do what you want - you need to make that person want to do it too. How can this be done? You need to offer what he wants. Ask yourself more often the question: "What, exactly, does this person want?" and then you will receive the key to his heart and behavior.
3) Great philosophers have long argued about the reasons that control our actions, and they all came to the conclusion that one of the main reasons that awaken us to action is the desire to be significant. Give people the opportunity to feel important, and you will have a whole mountain of friends and acquaintances.
4) The last principle, but not the last in the meaning of communication, is "Show a sincere interest in everyone." If you are interested in people, they will be interested in you. If you praise people you think really deserve praise, they will love you more and more every day.