Personally, I believe the concept of intention manifestation and the law of attraction to be a little too farfetched. Whilst it is obvious to me that your thoughts determine your actions and so consequently have a dramatic affect on your reality and how you interpret that reality, to suggest that your thoughts somehow create your reality bypassing the need to act, seems abit outlandish to say the least.
This reminds me too much of The Matrix and the teachings of the pseudoscience bashing new age entity named Ramtha. So before you're ready to throw in the towl of sanity and ignore all logical impulses, I urge you to be a bit more sceptical and question this dogma.
If however you are too wrapped up in the mysticism of this concept to question it rationally, then I challenge you to jump off a cliff and manifest the intention to sprout wings.