I didn't know that about flipping the blade. Good tip Tiffany.
Being a beginner quilter I make a lot of mistakes, but I took a hint from sewing clothes. Instead of stitching the whole length of a seam where it's critical the corners or seams match, I just stitch the seam intersection first, maybe an inch or so to make sure they match perfectly, then you can lay it flat to see it matches between the seams before you sew the whole thing. It saves me a lot of frog stitching.