Let us remember that there have been many highly succesful people who I do not believe have used the law of attraction (at least not in the way that people think it works). For example, Albert Einstein. He was very depressed and considered himself a failure when he worked at a patent agency. I personally do not believe that he succeeded in becoming an acknowledged scientist by thinking things like "I (will) succeed!", "I am famous!", "Failure is not an option!" "I do have plenty of money!" etc. What I believe helped him was that he found pure joy in the simple fact of being. That was, according to my hypothesis, when he started loving what he did and doing what he loved: thinking and writing in his free-time. And that helped him become a scientist. Not stubborn thoughts about "already being a scientist", just a love for knowledge, doing the things that he loved doing.
I believe that the most succesful people don't usually think about money a lot. They don't succeed because of their "positive thoughts" that become reality. They succeed because of their love for life itself and because they do the things that they love and love the things that they do.
It really doesn't matter wether one is rich and succesful or poor and, um, "unsuccesful". What matters is how life feels. And life feels good when a person has found the joy of being alive and started doing the things that he or she loves.