You may remember this mantra because I have discussed it here a few times.
While it did nothing for me personally, Wayne Dyer and a lot of other folks swear by it.
Ara Kara is supposed to be the sound used for removing the concept of impossibility, thus allowing material and spiritual manifestation to take place.
All I can tell you is to give it a try if you want.
Like I said, I had no results to speak of but I have heard a lot of people say they did.