Convenience is the biggest drug of them all, if you can break that then you can go a long way to breaking a habit. Even just putting up minor inconvenience can help slow the habit formed behavior.

If you have a food addiction, remove all the pre-packed easy stuff. If you have to cook a meal to get the calories, you now have a step speed bump to the habit. It doesn't mean you cannot eat, it just stops that grab and go mentality. Same thing with the fridges of the internet (social media).