I stopped doing long rows. I put my quilts together in quarter sections. I start by putting all the blocks into giant four patches. Then those four patches into even bigger four patches or sections until I have the quilt put together in roughly four quarters. If the quilt isn't an even number across or down one section will be one block wider or longer. Then I sew the top two sections together and the bottom two sections together and then you only have one full width seam. I noticed the first time I put a quilt together that way that it came out straighter and squarer than doing row after row. You do have to really pay attention to which way you press your seams though.