This is a cool site! I came into the post to recommend what I see it calls the "better bow shoelace knot," which is basically you loop around twice before pulling through, as it says on the site. Someone -- I forget who -- taught it to me when I was in... grad school?... and my shoelaces continually came undone, and now they never come undone! (Even though I think I still make granny knots, which I didn't know about until reading the site.)