I have some hardcore belief systems that really get challenged by questions like that. My experience in the past has shown me that often, when I decide what I want, go after it, and don't get it, that wanting=pain. Therefore, don't want. Be happy with whatever you get.
And I'm sick of it.
Does it REALLY work to believe the opposite? To believe that I can, as you say, "step into" a new reality? Can you give me a simple example?