I buy only for each project. I slightly overbuy so I have some room for error. Leftovers are accumulated until I have enough for a scrappy quilt. Then it is all cleared out again. Easier that way. So many people overbuy and end up selling or tossing fabric or are overwhelmed by what is in their quilt rooms. I have just what I need. Also, if I move away from quilting for a while, it doesn't bother me. I don't feel obligated to constantly quilt because I am drowning in expensive fabric.