I have a full press at the shop but at home I use a heavy cable that has a chaulk on either end. I draw the bow with one hand and my foot then insert the chaulks of the cable into either end of the limb at the fork then let down on the string. The cable takes up the tension on the limb and allows the string and cables to go slack. It's handy for in the field as it weighs nothing, but it has to be custom fit to each bow and it doesn't work if you can't draw the bow (i.e. broken string). It looks something like this: I------I