It's a work in progress, but with progress. I'm always a little scared about that, not because of rational thinking, but because of the experiences I had. I just commented on one of Galenkp's post that I tend to take 50/50 risks quite often, as I developed the skill to make the best out of something going wrong. With her, it feels like a worse risk, but in reality, it's better. Until it isn't, of course.
And yes, those lines are important. I do easier if I have a certain number in mind. If I tell myself - I'll only have 2 beer tonight! - on a Friday, it's a lot easier to stick to that. And even more so if I tell others.