I would first mark the row number at the top of your columns. Then, sew column 1 to 2, 3 to 4, 5 to 6, etc. (You will have sets of two's on your design wall.) Then, from the bottom up, sew columns 2 to 3, 4 to 5, 6 to 7. You get the idea. It will save your Bargello from getting wonky.
Sewing them in sets of two's will help you know which direction you need to sew, while keeping them organized. Otherwise, if you sew just adding a column onto a large piece as you go, you might get all confused and accidentally sew a column upside down. Hope this makes sense.
Last edited by Girlfriend; 05-06-2015 at 10:50 PM.