If you are at all like me, I was forever stepping on my own shoelaces, and untying them. That happens especially if the laces are a little too long for the shoe. To solve the problem, I tied them differently, with resorting to double knots. So, I'll try to explain it at best I can. If you have a question, though, send me an email, or post your question here, as I'll try to answer it as quickly as I can.
Here it is:
Make the half-hitch, as usual.
Then, when you make the loop, and hold it with your hand, go around the loop twice
, then finish tying normally. Pull it tight. Voila!
The knot will pull out normally, with one hand, and won't come untied.
I'm sure I was clear as mud. If so, just give me a shout.