>>Tomte+(OP)
Ah! This page was on the front page of somethingawful a good ten years ago. At the time I had shoes with particularly slippery laces, so I started using Ian's Secure Knot, and never looked back: http://www.fieggen.com/shoelace/secureknot.htm
>>sbierw+gC1
I think I've used this one as well for about 7 or 8 years. I can recall an accidental untie exactly once. It's also fantastic because it makes for a much more symmetric, shapely knot.