I would take a rotary cutting class. This had to be taken in some LQS's prior to a beginning quilt class. Cutting does improve as you go so if you start doing it more often you will get better. Also I block my blocks now which has made my piecing more accurate. For strips I was not accurate until i got the june tailor shape cut. I has vastly improved my skills and I highly suggest that ruler much cheaper than buying an accuquilt or sizzix cutting system for accuracy. I also have those little plastic dots on all my rulers, and my long ruler has the lipped edge which I love