here is Matt's tutorial
http://giftshop.scottishtartans.org/garter_howto.html
I use a couple others
1. A simple Square Knot ( because of the bult of the knot, I only use it with Hose the have "thick" cuffs or with my hose toppers.
2. !/2 Windsor Knot ( like a tie ) A full Windsor can be used if you need to take up more material. ( this the one I like.)

Here is a picture of the Windsor