There are quilting pins you can buy. I use ones with a flower head. They're long and the head is flat, so they don't cause a lump when you roll the quilt (not that that's a real bother). I took a class at one of the quilt shows with Linda Taylor, and she used what looked like corsage pins. They worked really well, too. Just make sure you get LONG pins, not short pins, or you'll be pinning for days!