Christmas decorations can be a bit of a challenge to store in a garage, especially if you have a lot of them. The first thing you should do is assess how much space you have available and decide what decorations you want to keep. Once you have a good idea of what you're working with, you can begin to plan out how to organize your decorations so they're easy to access and out of the way.
One option is to use large plastic bins with lids. You can label each bin with what's inside, such as "Christmas lights," "ornaments," or "wreaths." Then, place the bins on shelves or