It might seem like a silly question for adults to ask, but what is the proper way to tie your shoes? Tying our laces may be a skill we learn as children, and a habit that we practice every single day. Have you ever considered that you might be tying your shoes incorrectly?
There are a wide variety of shoe string types (flat, tubular, cotton, synthetic, etc.), as well as different placements of the string eyelets, and different sizes, shapes, and weights of footwear that all effect how well a knot will stay in place. Many of us know how to tie our shoes, but many have been taught the incorrect form of the standard "bow tie" shoe knot. Universally speaking, there are better knots to tie that will ensure a more secure and longer fastened shoe.