Budget, Budget, Who Keeps A Budget?

I read an article which stated that only 32% of American families setup and keep a budget and it seems the government doesn't do a very good job of keeping one either.   Canada doesn't fair much better at only 47% of its families keeping one as well.

I have to say that I usually am not that organized to keep one but do admire people that do.   However,  in saying that we we don't physically keep one, we do keep one sort of in our heads.  We also don't have credit cards either which helps us keep our money in line.

I am curious though about how many of you keep one and how you make it work.