I also use OnebyOne, and Stitchrippers' method. one of my beginning quilts was a Trip Around The World in a class and we numbered each row with a pinned paper. Then we stacked the blocks starting from the top, pinned through all of the stack ( in case you drop one). Then sew 2 onto 1, 3 onto 2 etc.
This was chain piecing so I was careful not to break the thread between the blocks, then I just sewed across.
I taught this method to a childrens class (10 -12 yr old). It took a little explaining but they learn