In short, you gotta swallow your pride so that you can move on. But this has to be a weekly activity. Each week you review the problems, slights and annoyances you encountered — that car that cut you off, the waitress that never showed, the supermarket clerk because the company advertised something but didn’t have it, or the telemarker caller that got you at a bad time. It is only by reviewing these episodes, so you are always in check with your actions, and so slowly you will be aware of them and stop them, short.
Of course to do this, you need to start with the oldest ones you can recollect & go from there…memory by memory, week by week until you’re good, and those bad habits are gone.