I love anything that will keep my freezer tidy and organized. I've written about how I use bags to keep things sorted here. And then there is this tip from Cheapskater Irene - and it is a beauty! It really works and it is one of my favourite freezer tips.
You don't need a lot of bubblewrap to cover the bottom of a freezer so before you have fun popping those little bubbles, cut some off your next lot of bubblewrap packaging to use in your freezer.