[jabv]

In Catholicism (and probably in some other religions), there is a practice of an "examination of conscience." It has helped me to make improvements of the kind you refer to.

Basically, the essence is to take 5 minutes at the very end of the day to think back through each hour of the day, perhaps with a couple of focus questions (eg "did I become angry, even internally"). You use your will to sincerely regret anything that you think was wrong, and maybe use a bit of problem solving to see how it could have gone differently.

Five minutes at the end of the day (maybe it stays on your mind as you sleep? but that's just my bro-science) every day for a month should help you make some small steps.

[snowpanda]

This is great, do you have any more resources where one can learn about this?

[jabv]

Sorry for the late reply, but most resources I know about would get more specific about particular morality of the religion. If that's what you're looking for, you should get plenty of results searching for "Catholic examination of conscience."

[1000units]

Catholicism really is a beautiful religion.