Note: The following instructions for making shock cord tarp tensioners were originally posted on the Yahoo Hammock Camping Group by Youngblood. I am posting them in a thread for the benefit of the members of the forum, with Youngblood's permission.
Two Loop Method of Tying a Clove Hitch Knot
The two loop method of tying a clove hitch knot is my preferred method of attaching shock cord to guyline to make a self tensioning guyline. It is also how I attach my round stakes to the guyline of my tarps.
Figure 1 shows the two loops as they are first formed. Note that it is important that both loops are the same and that they are formed in a counter clock wise direction where the last part of the loop is on top of the beginning part of the loop
Figure 1. Form Two Loops
The second step is simply to position the loop on the right underneath the loop on the left to form a common ‘double loop’ as shown in Figure 2.
Figure 2. Overlap the Two Loops
The third step is to insert whatever object you want to form the clove hitch onto; in Figure 3 the two free ends of a loop on shock cord are shown.
Figure 3. Insert Object Into the Two Overlapped Loops
Figure 4 shows the cinched clove hitch knot finished off by pulling the two ends tight.
Figure 4. Finished Clove Hitch Knot