I saw the first two and thought this was going to be a joke. After seeing so much nonsense relating to their effectiveness, I can't take nofap and cold showers seriously as legit advice anymore. I went 5 months without fapping during a time in my life when I was quite depressed and it had no effect, other then a shut-down on my libido perhaps. But yes, the following points are very helpful. Overall though being confident through your stutter, accepting it and making it not have such a control on your psyche, are fundamental to reducing it.