For me, instead of cutting all of it out at one setting.. I would cut out about 1/4, sew those rows together, then cut again, sew... etc.. until finished.. That way it breaks the monotony of doing the same thing so long. Of course some designs you can't do this to... but do take a break when you can.
Also by doing some sewing you can spot if you have made a cutting error before you cut all the material up.