This video from Runners World is more helpful that you might think at first.
If you're like me, it seems like I'm always having to re-tie my dress shoes. I thought it was the slick texture of the smallish laces, but it appears that I've actually been tying my shoes incorrectly all these years. Who knew that there was a "right" way and a "wrong" way to tie shoes?
Apparently, I've been using a "granny knot" when I should have been using the more efficient "reef knot". The granny knot gets loose over time, while movement actually causes the reef knot to tighten.
In my defense, I have had an interesting history with shoe tying through my life. In kindergarten when my teacher asked me why my twin brother Tom was 20 minutes older than me, I replied "Well you know I have trouble tying my shoes!"