The way you think, determines the way you feel and the way you feel determines the way you act. If you want to change your actions, just change the way you think and it will inevitably change the way you act. If you are depressed, discouraged and distressed it may be because you're thinking depressed, discouraged and distressing thoughts. That's your choice. You don't have to think those thoughts.
ROMANS 12:2 - Be transformed by the renewing of your mind.