The Law Of Attraction Is A Simple Truth.Wikipedia states that "The Law of Attraction is a metaphysical New Thought belief that 'like attracts like', that positive and negative thinking bring about positive and negative physical results, respectively."
Most people believe that the harder they affirm their positive thoughts, the most likely they are to receive their intended rewards. Often times, simply the act of forcing oneself to not think negatively brings negativity, regardless of if one wants it or not. This way of thinking is contrary to the Law of Attraction.
My thought on this is rather the opposite. Instead of forcing your will on the universe, simply BE. Put out good to the universe-- help your neighbors and friends, be kind to strangers and those you know, and show love to everyone around you-- and you will receive good in kind.