Most of the time it depends on how large I want the quilt to be that determines how I sew it together. Plain sashing, or I have sashed them like a shadow box or put them on point. Usually put them all together and try the different ways to see which one I like the looks of better. have seen some that just sew the blocks together and sash around the outside. Whichever you like is the way you should sew it. I'm still "auditioning" mine for the final decision.