The addiction model is useful in understanding sub-optimal trading behaviour. You aren't likely to be able to overcome the problem until you blow your account out (or do serious damage) step back and take some time off, come back and make exactly the same mistakes agian, lose more money, do it again and repeat until you absolutely reach the bottom of the barrel. You may then be able to do what you know you're supposed to do.
That's the way it went for me, even in swing trading which is what I do, mainly. I used to have a win/loss ratio of something like 3/1... except for the fact that I allowed myself to get stopped out of so many of my winning trades for pennies or small losses, only to see them run away. I had way too much money in my account for the volume of trading I was doing, so I took a bunch of it out and said to myself that I would lose what was left, I didn't care, but I was going to follow the rules no matter what.
That made a big difference for me. In any case, you just have to lose and lose some more until something clicks. If it ever does click.
Maybe some guys just start trading and never make these mistakes, I don't know.