>>Tomte+(OP)
One thing that's worth noting about the classic bow shoelace knot is that no-one seems to know how to do them. The right way to do it is with the bow knot reflected relative to the base knot below it, like a reef knot, rather than oriented the same way, like a granny knot. I never knew this until a few years ago and since I've started doing it, I've stopped needing to double-knot my laces - they're secure enough for me with a single knot done properly. I always try to explain this to people when I get a chance, and no-one else seems to know about it, either.
I see there's a page about this on the site: http://www.fieggen.com/shoelace/grannyknot.htm