Follow the project before choosing a finish
A decorative sampler, a two-layer cloth and a garment repair may need different ways to secure the thread. Check the kit or cloth instructions first, especially if the reverse will be visible or touch the skin.
Traditional examples do not all use one universal knot rule. Describe the method you use and make sure the end is secure for the way the piece will be handled.
Keep the start away from a stress point
Begin where the pattern and cloth give the thread room to settle. On a repair, carry the first stitches into sound fabric rather than stopping exactly at the old hole’s edge.
Leave a small amount of ease as the first stitches settle. Pulling the start tight can create a ridge before the rest of the pattern has even begun.
Inspect before trimming
Turn the work over and check that the end cannot pull through the fabric. If the thread has formed a loop, crossed another line or sits against a moving seam, correct it before cutting.
Trim only after the finishing method has been tested by gently moving the cloth. A neat end should remain secure without making the surrounding stitches rigid.