Other than for detox treatment is not a necessity and even detox can be supervised by a physician if one is not too bad off. Create your own "treatment plan". Most people get sober without treatment, AA, or any other formal program. There is not single most effective way to do it other than to quit drinking. Treatment gives one time in a safe environment, but there are other ways you may arrange this also. Remember, lack of treatment is not reason not to get sober.