Important concepts to be aware of:
The land of what should be is a fools game.
Try to interpret the reality around you and act accordingly.
Understand the parameters of the game you are playing and work from there (this one can take a while).
Try to accept what’s beyond your control – it will keep you from fighting battles you can’t win.
If the ship has sailed, you’re not going to bring it back to port. Save your energy to fight a battle you might win.