This is super detailed and exact. Open the video up in a separate tab for easier viewing.
You will need a threaded machine and a small piece of fabric to practice this first stage
This video is a full on introduction that takes you from Zero to Napkin in one video.
Or... if you'd rather do an intro in smaller chunks and not do the napkin, go onto the resources below.
The video the right contains some helpful hints, but the links below provides a much more detailed introduction and explanation of how to use conductive thread in your sewing and electronic project.
Lights, 3D Printing, and Sewing all in one!
Costume Lighting Tips and Ideas