I have redone mine a couple of time, but still not sure what is best. Many have several colors so they could go with a lot of different things. I do keep Christmas and Red, white and blues seperated together???? (is that an oxymoron or something) but the others are pretty mixed up. Sometimes it is easier to pick things that go together, that I might not see if they were only sorted by color. Maybe I'll do enough quilts someday that being more organized will feel better, but I doubt it, I'm not that organized with other things. Guess it all comes down to personality.