I learned how to make friendship bracelets a couple years ago. The first thing that I learned was that there wasn't just one kind of knot to make a friendship bracelet, there were 4 different kinds. In this Instructable I will show you how to do the four different kinds of knots and what they will look like on a friendship bracelet pattern.
I learned how to do all this and more at friendship-bracelets.net
The first thing you want to do is gather some supplies. You will need tape or a clipboard, some embroidery floss or yarn of two different colors (remember this is just for practice so I recommend using yarn), some scissors, a ruler, and yourself (or another person who can do the work for you).