Paul wrote a great blog post
here that complements this wonderful post very well. It was a real epiphany for me-- suddenly I "got" it so much better!
What brought it to mind was his analogy of thinking of the thing you want as though it were a DVD that you planned to buy when it comes out in the stores in a few days. You don't physically have it yet, but you might as well-- you have absolutely no reason to believe you can't just go and get it when it hits the store.
In this case it's almost like looking at the kind of money you want to manifest as though it were the annual bonus or cost-of-living raise that you know your job will be paying you. It's just business as usual, right?