Place the two pieces of fabric to be sewn together on top of each other.
Knot on end of your thread. Place your needle in between the two pieces of fabric. Pull your needle through one piece of fabric which will hide your knotted end inside.
Put your needle back through both pieces of fabric (front to back) pulling the thread through. Do the same again from back to front. This will look like a spaced series of dashes!
You are now doing the basting stitch! To end a line of basting, you can knot between the two layers of fabric again or if you don't care about appearance, knot on the outside which can be easier to do. :)