You owe it to yourself to acquire, perhaps as a Christmas present, Dr. Wayne Dyer's book and/or CDs, "The Power of Intention."
One of the things he says is that all of our troubles are in our mind. When we go to meet our maker, what happens to the things we were worried about? They are gone.
Much earlier, I benefited from a book by Dr. Eric Berne, "Games People Play." It gives a good analysis for how to recognize, and perhaps respond to, "head games."