Repeating words over and over again over time has the potential to change your belief system over things. For example if you have a habit of smoking, the best way to quit it permanently is I think by repeating the negative effects of smoking over and over again.
Just keep repeating like you mean it, Smoking cigarette can cause lung Cancer. Repeat this 50 times before going to bed.
Over time you will develop a belief system and whenever you get cravings, the words you repeated Smoking can cause lung cancer will pop up in your brain automatically and it will be way easier for you to neglect the cravings.
You may relapse but don’t stop repeating the words. Instead increase the repetition to 100 times per day.