When the Russians proved, that you can go into outer space. NASA began to train its astronauts. The main problem of being in zero gravity is to understand, where is the top, where through. Then each applicant got glasses, which they had to wear 24h. These glasses changed the image in reverse.. Began to observe, how the power of habit works. Претенденты носили очки от 21 to 25 days. And all of them had their brains adapted and flipped the picture., without hesitation. They saw, for example, inverted glass, and the brain, flipped it back, and everything was fine. Complicated the experiment and decided after 14 days take off glasses for a day. Total for 1 day, and then put on inverted glasses again. It would seem that, one day difference, this day will push addiction to 1 day, well maybe on 2. Not, added again 21-25.
I.E.. 1 the day of skipping the formation of the habit completely reset everything and had to start over.
This is how our brain works and it is useless to fight it. From 21 days at least.