Elizabeth Hartman writes her patterns is she gives the directions to make the quilt or to make one block at a time. She often even gives multiple options for quilt size. And there are usually instructions to make a pillow.
First, using a wool pressing pad. I have a friend who does amazing precision piecing, and she says the wool pad has improved her precision--something to do with the fibers not allowing the fabric to shift and distort when pressing.
corner pop ruler --traditional piecing would have you drawing a line across the diagonal, sewing on the line, and then trimming the excess fabric. The problem is I am challenged at drawing straight lines, even using a ruler! So, with the Corner Pop ruler I cut first, then sew. And I'm more accurate, so that's a win.