How can I create free-standing DIY garage shelves for storage?

To create free-standing DIY garage shelves for storage, you can use materials like wood planks, brackets, and screws. Measure the space in your garage and cut the wood planks to the desired size for the shelves. Attach the brackets to the wall and then place the wood planks on top of the brackets to create the shelves. Make sure to secure everything properly with screws for stability.