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All or nothing approach to quitting leads to quitting completely or going back to the same state, When I quit smoking I used to quit for a week then a month, later I quit for a long time and I did smoke once after a year, I did not treat it as a failure and just a break in my quitting, have not smoked since, I may some time if there is a special occasion ,but I don't think that would get me back to regular smoking. I have seen some quit and then once they smoke or have a drink resign thinking their attempt to quit has failed and then going back to the habit.

You may have breaks in your quitting , but that's ok get back to the quitting state as soon as possible.