That's why you first need to change your expectations, your beliefs. Try to gain confidence, be more positive! That's the most effective way to stop stuttering! Most people go for techniques like air-flow technique for instance and end up failing. Your mind is what makes your speaking muscles tense up and stutter! Go for the roots of the problem. Try to slowly step out of your confort zone. Learn to say no to people! Once you gain enough confidence your stuttering will go away by itself, it happened to me. Read this article http://www.masteringstuttering.com/recovery-stuttering.htm It will tell everything in detail.