All humans become habitual. Aside from addiction, habits also include mannerisms, customs, and rituals. Habits are really nothing more than thought patterns which have become automatic.
Ego will support these thought patterns by coming up with every excuse in the book to maintain them. Many of the habits we form serve us well and will continue to serve well for a lifetime.
Some of our habits may become outdated as we strive assiduously toward new goals and lifestyle changes, but are still running the show. Still other habits we adopt may be down right destructive—dangerous to our well being and to those around us. Any habit that does not support our goal is taking us further from it and must be extinguished quickly, to be replaced by a habit—a new blueprint—which does support our intention.
The most effective way to oust an outdated or destructive habit is to be ruthless, immediately cutting all ties. Focus on the polar opposite. With proper use of the will, choose only those thoughts that support and represent the new blueprint we wish to implement. Through starving the old blueprint by lack of thought toward it, the old habit dies of malnourishment.
A clean break is what is required. Draw on the power of the subconscious mind. It will respond.