When it comes to the morning of a wedding one thing will always be certain and that is that every man in the grooms house will have an opinion on how to tie a knot. However whether it is the right opinion is another question.

So save yourself the wasted time of arguing and print out this invaluable guide from Bensilver.com. It has 8 different types of knots, ranging from Ascot to Half-windsor all with clear pictures to guide you. The site even includes a movie showing you how to do each knot.
http://www.bensilver.com/style04/knots_ascot.htm