The Law of Attraction is a deep subject and you seem to only have a very superficial understanding of it paired with a closed mind. The reason most people aren't excellent at it is that most people have very deep seated beliefs about limits and have a lot of fearful thoughts that they pick up from society. Even babies pick up and mimic the negative moods of those around them.
Throw emotion and energy into everything you do. Even negative emotions can be transmuted into positive. Did you ever see someone red in the face with anger suddenly see the humor in a situation and burst into laughter? It can be one of the most beautiful things to witness. Do everything you do with emotion and the universe will love you for it. The law of attraction brings a tidal wave of energy that flows through emotion.
It's curious that people who believe in a LOA are critical of those who don't and believe them to be close-minded. I have presented a lot of new data such as the erroneous science and the data showing that acting as though you had already accomplished your goals was detrimental to you doing so. Yet, LOA proponents do not look at this with an open mind and reconsider their belief system. In this way LOA is akin to a faith-based religion, except that religious beliefs can't be disproven.