I am a stammerer and need to learn how to get rid of this problem; please suggest some exercises and techniques.
I am not a specialist with this. You can get better advice at stammering.net where they recommend books, self-study and other support. However, almost everyone finds that they do not stammer when singing. Singing engages the body and the entire energetic system in ways that speaking also can, if we do it with the same intention and refined function. My students who used to stammer started out by singing what they would speak, and eventually just imagining they were going to sing would generate the flow and support of the speaking voice that enabled them to overcome the stammer.