Comprehensive doesn’t even begin to cover the amount of information on this site about tying your shoes.
Andy's Most Useful Knots
I've had this desire at the back of my mind to re-learn a lot of the knots I've forgotten since my days as a Boy Scout. I'm rather embarrassed that I remember so few of them actually. Andy's collection of knots looks like a great place to start digging in.
Bonus: knots look like a fun way to keep my hands busy while watching TV.