It helped me to take stock of what I had and put everything away. I realized the insanity that is my sewing room so I decided that I needed to seriously curtail my fabric shopping. Now I try to limit purchases to items that support an ongoing project, or something I truly "just gotta have" AND I make myself shop from the stash for all new projects. It has worked - sort of. If you read the moratorium thread, you'll find me having fallen off the wagon a time or two. In general, I can say that the approach works. I actually don't feel bad when I buy something now because I know that I thought about it.
Next weekend, I'm going to a quilt show and I know that I will buy a fabric package - but it is to gift to a quilty friend in Germany. That way I get to feed the beast without actually keeping the goods.