If you've ever weaved in your ends as you crochet then you can do this. All you're doing is weaving the old yarn in 1 time only then dropping down. It's ready next time you have to pick it up.
Check out the video at the link right below.
My Crochet playlist can be found at https://www.youtube.com/playlist?list=PLuXN9cpMQZFIJ-8jTWpbTgowZBEwgpYvI
Check out my Facebook page "Crochet Den" where you can see my patterns, videos and leave your own if you wish, for other's to see.
Have fun creating!