Resources:
There are very few books I can recommend but a number of people basically write the same thing. Here are some online resources that relate to the things I mentioned above.
However, I would strongly advise against using "formulas" especially if it goes against what you believe in. That won't work well. Use it as inspiration, do what works for you and good luck ...
Resources:
- I statements, separate facts from subjective viewpoints: Alan Sharland: "Using 'I-statements'"
- in addition: Huffpost: "The Trouble With 'I Statements,' and What Works Better"
about nonviolent communication:
- Book: Marshal Rosenberg: Nonviolent Communication (see also this short introduction)
I would like to add: NVC may seem weird at first because it completely contradicts what we are used to. It is not based on some religious faith, it is not a sect or a cult. It is just something which "really works" in my personal experience if you are a little open. However, it does need some practices and you may not want to use it in all social settings. But it is also something you can do only in your head, to separate your own thoughts, feelings, needs from your judgments. You will become more self-aware which might be helpful, without even having to change your communication style.