I also struggle with kicking some of my addictions, but I have kind of been successful from time to time I guess.

I suggest that you consider going to counselling even though you may not trust the doctors, it may be unappealing to you now but you never know until you get there whether or not it is going to help, I think it's worth a shot anyway.

But if you've decided that that is not an option for you, one thing that helped me a lot was to constantly research the negative health effects of what I am taking. Whenever I would get a craving I would go online and search for "effects of _______ abuse" and I would learn about liver cirrhosis or brain damage and doing that helped me to kick all drugs and alcohol for about a year. I never went to a program or anything. Although I relapse now... I'm still better off I'd say.

Also I would suggest looking to a higher power. I won't say anymore than that cause I don't want to offend you, I know it can be a touchy subject with a lot of people. But if you're up for it, do some soul searching, you may find it helpful.