Wow what a great question - I just finished 24 miserable honking flapping (those words are euphemisms for what I really want to call them!!!) geese, using the waste a little triangle method (which is what the patterns seem to call for) and I have had a terrible time finding exactly the point to put the needle down at the top of the line. Somehow I just can't see it and line it up or it wiggles a nudge. If I dare to chain piece it wiggles away at the end before I can control it. And I have a hard time just drawing a fine line which goes right to the corner because the fabric wiggles away.
As a result, points will never be perfect, often the pieced goose is curved on the top and not the full size at the wing corners, sometimes the bottom of the seam allows a tiny gap between the wings and the goose......
Geese HONK!
Thank you all for the good suggestions and tutes.