I recently completed a larger project (which I will post below)in a garage. Getting items “off” the floor” is very important when it comes to restructuring the space to appear more open, and larger. This is my recommendation to any project I do. Having the floor free of “stuff” makes such a difference; as you can see below ~
I also highly recommend the shelves shown in the picture. They are adjustable, and you can build the shelves according to the items you place on them.
They come in three sizes: These are the large ones. Medium ones are only about waist-high.