I believe that most of us won't "outgrow" our stutter ever, but that doesn't mean that we can't experience it diminishing over time. I think your suggestions are good, however for many people it's not quite so easy to just decide to make these changes. In my opinion, learning strategies to decrease the intensity of the emotional response, and to get the nervous system out of fight or flight can lead to more success in learning to change stutters and/or speak with more ease.