Do you realize there are things you cannot change? By being at peace with the things you cannot change, you give yourself power and effectiveness over the areas where you can indeed make a difference.
Understand how great it is to be well aware of what you cannot do. Why? It gives you the ability to put all your energy and resources into efforts that will make a positive difference in how you can live your life.
Beginning today rather than being frustrated by what you cannot do, begin to accept what you cannot do. Why? You free up your time and energy to devote to what you can do and see the difference it will make.