Tutorial here:
http://www.quiltingboard.com/t-89997-1.htm
you really do need to figure out where on your machine this is. If your quilt is made up of all the exact same blocks, then just being consistent will be just fine. As soon as you try to piece one block with 3 seams next to a block with 2 (or 4 or 5) seams, you will start to have problems.