Alcoholics Anonymous
Almost everyone who has had a drinking problem and hit rock bottom assisted in some way or another to this 12-step program. It can be very useful and effective for a very specific type person.
This is because you have to discipline yourself to go to a meeting every day, and you also have to be willing to submit yourself to a higher spiritual power for it to work.
This program has been proven to work IF YOU FOLLOW IT every single day of your life. By no means is it to be ignored if you really feel it can help you.
However, you should be aware that AA historically has had an 8% success rate, and you have to fit the profile for it to work.