Learn how to tie a sewing knot in the thread when hand sewing to anchor thread in the fabric so that it is not undone as you stitch.| SewGuide
You are right, I am speaking from my experience. If you want to know more about some of the most basic sewing machine stitches your sewing machine (probably)| SewGuide
Ladder stitch, its uses and illustrative images showing how to sew these stitches for producing a nearly invisible seam and others beautiful variations| SewGuide
Learn the different methods for sewing hems and seams using stitches that seem almost invisible from the front and sometimes from the back of the fabric| SewGuide