I don't know if I learned it from Jenny Doan but, when you have sewn down all but the final tail of the binding, overlap the tail the same amount as the width of your binding. EX, if your binding is 2 1/2 over lap the tail 2 1/2, if your binding is cut 2 1/4, overlap the tail 2 1/4, make sure you cut the tail that overlaps, it works for me every time, but I do check to make sure it fits before I sew it down.. There is a tut on Utube somewhere about sewing on binding.