A trick I learned on the old TV show "Simply Quilts" was a quicker and more accurate way to cut fabric. You cut a large piece and then move the ruler to the left and continue cutting smaller pieces. For example, if you needed to cut 2in strips and you have a 12 in. ruler, make your first cut at 12in. then the next cut as ten, then eight, etc. you move the ruler not the fabric. By doing this your fabric doesn't shift and you get accurate cuts.

It never donned on me to do D9P that way. Thanks for the tip GagaSmith!