The first thing you should do is think about what can go and what has to stay. You will probably be surprised at the number of items you can sell, donate, or simply throw out. If that does not clear out as much room as you had hoped (or even if it does), you will be faced with the task of getting organized. There are companies that can do this kind of organization for you, or you can attempt to tackle the job on your own. If you choose the latter, below are some tips that can help you.
Wall Garage Storages
One of the best things you can do to create space is make or purchase shelving, hooks, and holders that stay off the floor. As long as they make full use of the wall, you will be able to clear a surprising amount of space on the floor. This can allow your cars to return to the space, or, if you are fine with them in the driveway, you can always use the space for something else entirely. Whatever you choose to do, it will probably be a better solution than having your affiliations haphazardly strewn about the area.
Cabinets and Shelves
Both cabinets and shelves can make excellent garage storages. Use whichever you feel comfortable with, but remember that shelves will give you easier access. Cabinets also have a tendency to get cluttered in their own right. You think you have everything organized when really all you have done is toss everything in what amounts to a box. That may clear out some space, but it is not going to make it any easier to find that tool you need when you need it. Open shelving, on the other hand, will allow you to see the contents right away, and they can often be a much cleaner and easier solution.
Use All The Space
If you are getting organized, but finding that you still have not reached the apex of garage storages, you might want to consider the ceiling. If you have a high ceiling, you can purchase hanging shelves and hooks that allow you to store more of your things out of reach. Now, this will not be an ideal place for tools and belongings you need regularly, but it can make an excellent solution for those items you only need once in awhile. So, be sure to consider all of your options when trying to get organized.