Who you are now carries the shape of what you have been, including much you chose and much you did not. That can sound like a fixed sentence until the same process is turned forward, since the self you will be is being laid down in what you do today rather than in what you intend or regret. The present is the only place where causes can be set at all.

Instead of resolving to be different, choose one action small enough to actually perform in the next hour. That, repeated, is the whole method, and there is no other one hiding behind it.