I glue baste when I really need accurate matching. I put a dot of glue on the intersections. Then, I measure each piece as I finish it and measure again when I sew pieces together.
I saw Mary Ellen Hopkins several years ago on Simply Quilts and she said that you should never sew long strips together because you are more apt to get things wonky. She suggested to make them into large squares then sew the large squares together. That way you only had one or two long seams to sew. I do this whenever possible.