Some people have successfully overcome their addiction without attending a residential Rehab programme. Various methods exist, like joining a support group like NA,  attending an outpatient rehab programmes, having session with a therapist/ counsellor regularly  and several others, all offer support in one way or another. Let's call a spade a spade, Using only of these methods individually is extremely unlikely to provide any real benefit in the near or mid term. 

Utilising several of the above methods together, could create a combination that would work for some people, though this will inevitably involve a period of trial and error until the individual components from each which resonate with you are identified, so as to create the right system for you.  

While it is a method that can , and has, worked for several, the risks associated with this system have derailed substantially more people than those who succeeded. Trying to establish this method, while still living in the same environment you became an addict in, with a subconscious mind that is determined to make you fail, makes success an incredibly hard objective to achieve.

We believe that going to rehab is the best option because it gets you out of the environment that had become toxic to you, with all the information you will need on hand requiring no effort to search for it, compressing your experience into one intense yet organised experience,  all while being monitored by trained professionals who are there to help guide and advise you. 

However, the biggest benefit, whose value you will not be able to truly appreciate until you have concluded the program, is having a group of peers around you who are having the same experience as you, yet have completely different background stories. Its from hearing the stories from these peers, from within each, tiny nuggets of information stand out and make sense to you,  which will merge together to identify and create 'your method'. Nobody else's will work for you, you have to find your own.