I used clothes pins and wrote the piece number on it with a sharpie. Clothespins are cheap and it really helped keep it organized.
I found that the pattern I used said to place like the picture, but in some pictures it was hard to tell their black from their dark. I had a few pieces upside and, of course, it didn't look right. When I found and printed the corrections, I also found a picture with a better color contrast. That helped a lot. Now that mine is finished, I can't figure out how to quilt it. I'll try to post a picture tomorrow..