French knots can be a little tricky, especially when beginning embroidery. They are great for adding details and texture to your stitching so worth practicing. I've found a couple of stitching tips that make it easy for me to create consistent, well formed knots every time. Click for the French knot tutorial along with the results of my experiments testing the effects of stitching knots by increasing the number of strands or the number of twists of thread.