I just try to do my best and they just naturally take on that quaint, 'she-really-needs-new-glasses' look.
Many years ago, I'd re-do until a seam was perfect. Needless to say, I ended up with very, very nice but very, very FEW finished items . . . all accompanied by headaches! Now that I'm older, I still try to do my best but have accepted that my best is far from perfect . . . and I'm okay with that!