I have this strange kind of cold turkey method I used, that sort of worked for me so I thought I'd share. Say you are on 20 per day. What you do is quit cold turkey, and wait until you inevitably fail. At that time though, you should have gotten to the stage where you only need about 10 per day as your brain is already partially readjusted. Limit yourself to that and then start the process again. Tapering is a slower way of readjusting, and with regular cold turkey, people give up completely when the give in, this way is the best for me, and might be for you too.