At the quantum level, both your thoughts and money or any form of wealth are nothing but energies. So if you want to attract money, you simply have to allow both these energies of thoughts and money to resonate. Then the Universe will start working in a subtle way to bring those two energies together in physical form. So at the physical macroscopic levels, you'll get opportunities to make money and when you'll take the necessary actions, money will start flowing in your life. This is how the Law of Attraction works.
So in order to bring the energies of thoughts and wealth together, you may use affirmations. There are powerful wealth mantras as per eastern philosophies which create certain vibrations for resonance with wealth.
Then there are subliminal music to generate alpha waves to bring your thought process in sync with energy waves of wealth.
Personally I have been trying combination of affirmations and mantras and found that it really works