Stuttering is a complex disorder and could be due to one or many of a multitude of reason/causes, and so we may differ in how we cope with it, or in how we try reducing it. Your story is fascinating in that such a simple "trick", one that certainly has its own benefits and perks, successfully eliminated much or all of your stuttering. It's certainly true that one single thought/idea may have great consequences in your life. Sleeping nine hours a day sure is healthy, but for me I've found that sleep deprivation helps me with my social anxiety and stuttering problems - just as much as alcohol does to certain fellow sufferers.