Purchase some prusik cord about 7'-8' in length and a length of climbing webbing and practice the basic knots.  This article covers all the curriculum knots with step-by-step instructions: Choose appropriate knots in any given situation.  For our load releasing hitch, I plan to use the Munter Hitch.  The Munter Hitch is great for belaying and very simple to tie.  The Munter Hitch is also great for Telfer Lowers.