Cut a toilet roll through the middle, and wrap it around wrapping paper to keep things in place and prevent it from unrolling.
Total Time: 5 minutes
Total Cost: Free
Source: Joy Astle for Apartment Therapy
This seems like a great way to save wrapping paper. Putting a piece of tape on the edge ruins the end. I'm thinking paper towel rolls will work great on those long, skinny rolls of Christmas wrap.