Not to be afraid to "square" up and match up my rows before final stitching.. I relied strictly on instructions and they (or my sewing) was a bit off, and I hesitated to trim to fit, but it all worked out, also I would have changed thread colors to show up more. It proudly hangs on my hall wall, and I get lots of compliments. Also changed to a new machine when quilting the top. New rule: good tools equals good results!!