Rather than using magic to create change in the current world, why not use magic to go to a world where the change has already happened? In his book "The Science of the Craft," William H. Keith writes: "A quantum event occurs. Let's say an atom emits a photon ... or it doesn't. Quantum theory says that both possibilities - a photon emitted and no photon emitted - are equally 'rea,' and it requires only an observer to collapse the event's wave function into one outcome or the other. Schrodinger's cat is both alive and dead, remember, until someone opens the box.
"The multiple-universe interpretation of quantum physics declares that both outcomes, in fact, exist; the universe we know branches into two separate universes - universes identical in every way save that in one the photon bursts from the heart of the atom and in the other nothing happens."
This means that in a parallel universe, you're about to win the lottery, in another you're about to die horribly. With directed magic, what you can theoretically do is you move yourself from the world you're currently in to one nearby in which your goal is a reality. Of course the obvious way to debunk this idea is to simply "will" yourself into a universe where you have everything you ever wanted, right? Well, it takes less energy to move to a world that is more similar to this one than it does to move to one that is more different.
This is because vast differences between one universe and another would be the result of the divergance happening a long time ago:
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http://img.photobucket.com/albums/v228/Rin_Daemoko/Occult/Divergance.jpg)
It's easy to move to a parallel world the closer you are to the point of divergance, because there's less of a "gap" to traverse, thus less energy is required to make the leap. At that point, the differences between the two worlds are not as pronounced.
So, it's easier to jump into a world where the only difference is that you drank coffee with three sugar and one where you drank coffee with two sugar, than it is to jump into a world where you drank coffee with three sugar and one where Hitler won World War II and the world is under Nazi rule.
Moving to an energy with subtle changes could be done using personally raised energy, but if you want to shift yourself into a universe where the Chinese colonized Europe instead of the other way around, you'd probably need the energy of an exploding star.
I'm sure there are countless ways to actually move the self into a proposed parallel world. How would you do it, given this idea? What is the viability of this magical technique? Have you already done it? If so, did you do it on purpose?