And if you don't have a kid or any other human to hold the pencil, put the pencil through the spool and then place the pencil behind the rungs on a wooden chair back (or some other such parallel objects) with the spool in the middle, and reel away. I think the easiest way to reel it onto your reel is to put your reel on just the bottom section of a rod, unless somebody has a better idea. It would probably be easier to put the backing through the first guide before attaching it to the fly line, but I never think that far ahead!