The idea that I am about to share seems too simple, but it has changed hundreds of lives, including mine: There are things you can change (problems) and there are things you can’t change (situations).
Most people seem to go through life fighting with, and agonizing over, things they can’t change e.g. weather, traffic, economy, their appearance, sickness, death, accidents. The result is frustration, depression, anger, anxiety, lot of stress and general unhappiness in life!
On the other hand, focusing on things we can change, improves the quality of our lives. We can change our attitudes, health, fitness, quality of our relationships, spending habits, level of our knowledge and skills, and many other things in life. Life is too short to try and change others.
A favorite prayer of mine: God, grant me the serenity to accept the things I cannot change; courage to change the things I can; and wisdom to know the difference!