I line up the folded ends and roll from that end, so the selvedges will roll last. The staggering will happen automatically. The other trick is to not create the roll when the strips are lying flat. Roll a couple of inches, then working on a slick surface, like a kitchen counter, tip the roll so the long cut end is against the counter and continue to roll. This way, the cut edges are always lined up. I can't get them as tight as the commercial ones, but they do look pretty neat.