Like Tarton said if using embellishments, like the lace, cording, even some of the stitches, you are better off doing it as you go along. The add on like trinkets, buttons, beads, those can be added later. Of course it all depends on the look you want to achieve .
As for the quilting, I never have quilted mine as I do my crazy quilting on muslin squares and I tie them or quilt in ditch, especially if you embellish with buttons, beads , old jewelery or photos.