Gratitude is one of the most important things to do to improve your life. Just taking some time and thinking about and writing down a few things you are grateful for every day can really affect how content you are. The act of reconzining the positive things you have in your life can pull it all into focus. Most of us fixate on the negative things and that creates a world where only bad things seem to happen. But the reality is the world is what you make it. Your interpretation of what you experience are what makes you happy or sad or angry.
I'm in no way saying that we don't need to change anything or try to make the world better. What I mean is you shape how the day to day annoyances and slights are interpreted. You decide on how you are going to react. Choose gratitude. Choose contentment.