Never do anything when you're tired! I've learned that the hard way....miscutting beloved fabrics, cutting myself with the rotary cutter, mismeasuring, not being as careful about 1/4" seam allowance....you name it, I've done it. Now I don't sew after supper unless I'm on a deadline and am really clear on what I'm going to do and how! (However, I am a BIG morning person, so 6AM is a fine time for me to sew! If you're a night owl, my "after supper" timing might just be your best time!)