Positive visualization is a powerful tool for motivation. It is one of the tools for healthy living in the WW program. In 12 step programs there is something similar which may help you as well Tricon, they say "act as if" meaning if you act as if you are not addicted to overeating or some other unhealthy behavior eventually the way you act will be the way you live. And by you I mean the general you, not you personally.
Also, I think there's a common phrase "fake it til you make it" which can mean the same thing. As long as these are healthy behaviors and don't become obsessive, they are great tools.
Thanks again for the reminder to visualize myself at goal healthy and happy!