When I entered recovery I came across the serenity prayer. Whilst I am not religious I really love the simplicity and power of this prayer. Since the start of 2018 I gave been trying to live life according to this prayer. It is not easy but I am finding it get easier. I really do feel that I am less annoyed (and increasingly not annoyed at all) by things I may have dwelt on in the past. Dwelling is bad but you can choose not to do this and mindfully think about something else.