I love scrap quilts but my scraps are called crumbs. Anything into which I can get a seam is used. And I do seams that are just over 1/8 inch. I start with the smallest two crumbs and sew them together. Find or make a straight side and sew another small crumb to that. After that, larger pieces are used. Leftover small triangles work well as do strips of any length. Squares don't work as well, but on the top I am working on now, I started making strips from a whole row of small squares. Looks wonderful. Most of my seams are not 90º. If the new edge is 90º, I twist the ruler a bit and "crooked" it.