most of mine is arranged by color. over time it gets rearranged by potential projects. right now i'm rearranging it again - primarily in color groups again - because it ate half my house. i'm making quilts in my head as i go, so some of it will be re-rearranged by all new project ideas.
i don't dare keep my PIGS in the poke. i have to keep them where i can see them or they never get to graduate to UFOs.