Use irritation or anger effectively
Irritation (or a stronger manifestation of the emotion anger) can be particularly damaging to work relationships (and, of course, private relationships). It becomes even more difficult when you are angry with your boss, as then hierarchy comes into play. But with anyone in a work context when you may become irritated, before you know it you may already have said something that could harm the relationship. This makes you less effective.
Mind you, I'm not saying irritation should be ignored or is about irrelevant stuff. To the contrary, there is a lot of information underneath your irritation or anger that you can, and probably should, want to do something with. However, you don't want your emotion to be in charge, you want to stay in control.
Additionally, anger is an unaccepted emotion in our society. As is Irritation . As a result, it is often also repressed. It may even be the case that you hardly feel any irritation at all, only that it sometimes comes on suddenly.
I recognize both cases. For me, it has been extremely effective to fully live out the anger once in a what is called a 'discharge session'. Then to be given multiple methods to arrive at a well-thought-out response, based on the information contained in the emotion (which usually goes beyond the obvious). This allows you to restore the function of the emotion anger instead of being led by it.