Visualization alone will not bring about a desire. Its just a tool to get the juices (emotions) flowing. By having the emotions/feelings of already having the desire, the universe HAS to deliver it to you.
What you think about, you bring about.
"Believe in what you feel inside, and give your dreams the wings to fly
You have everything you need, if you just believe" - Believe, Josh Groban
its hard to have a better tomorrow if you're still thinking about yesterday