Those who stutter need to concentrate on a positive attitude

"The blows of life, the accumulation of difficulties, the multiplication of problems tend
to sap energy and leave you spent and discouraged. In such a condition the true status of
your power is often obscured, and a person yields to a discouragement that is not justified
by the facts. It is vitally essential to reappraise your personality assets.

Dr. Karl Menninger, the famous psychiatrist, once said, “Attitudes are more important
than facts.” That is worth repeating until its truth grips you. Any fact facing us, even the most hopeless, is not as important as our attitude toward that fact. You may permit a fact to overwhelm you mentally before you start to deal with it. On the other hand, a confident thought pattern can modify or overcome the fact.

So if you feel that you are defeated and have lost confidence in your ability to win, sit
down, take a piece of paper and make a list, not of the factors that are against you, but of those that are for you. If you or I think constantly of the forces that seem to be against us, they will assume a formidable strength they do not possess. But if you mentally visualize and affirm and reaffirm your assets, you will rise out of any difficulty."

from The Power of Positive Thinking by Norman Vincent Peale