I start on the lower right corner and pull the quilt toward me while working. I've found it's easier to pull it than to push it through the machine. I do swaths approximately 6 or 7 inches wide, the length of the quilt, trying to make the edges cross over into the next section in a few places so that it will all blend well. When I get to the middle of the quilt, I turn it around and begin from the middle and work out to the unfinished edge. Since I glue-baste my quilts everything is firmly basted and I don't have to start quilting in the middle. No puckers, no problems.