Just saw a great tip for those of us who like to hand quilt and not have problems hiding the knot at the back of your work.
It is always a problem if you start with a knot to try and pull it through the back so as it does not show on the back of your quilt.
When you start to hand quilt insert your needle and thread from the front of the quilt, leave at least half of the thread "dangling" while you continue to hand quilt, at the end "hide" your thread by weaving between the batting, now comes the magic bit, return to your tail of thread you left at the beginning and continue to hand quilt in the opposite direction ending again with hiding the thread in the batting.