I sort calicoes and "regular" quilting fabrics by color with a few exceptions. I keep blacks/white; red/white; blue/white together. I keep my Thimbleberries separate (but haven't sub-sorted them by line). Other categories are Civil War fabrics, 30's fabrics, juvenile prints, panels, patriotic, seasonal/holidays, border prints, homespuns, neutrals. backings and shirtings (which are my newest "thing"). I'm still trying to come up with better organization with scraps. I keep fat quarters in a cd tower and scraps (depending on size) in drawers of an old bureau but really like things out where I can see them.