I'm trying to get my head around the idea of all the multiple uses my garage has, but I'm having trouble making categories. As an extension of my home, it sees use as a workspace, storage, and sometimes even parking. I'm hoping that this will help me better organize the space and make more efficient use of it by dividing and assigning locations, and not just putting stuff on shelves. Has anyone done this that can give some pointers?
It is very smart to start your planning by thinking of the various uses it will be put to. You can further break things down by planning a flow for different processes. For instance, if you do woodworking you can plan for material storage near the door, then planer, jointer, vertical bandsaw, tablesaw, router etc.
Zoning might be between woodworking, assembly and finishing areas.
Also think about the balance between fixed and mobile items. Some things need fixed locations like a big compressor. Mobile items let you rearrange things to suit different needs, and can be a way to make a space do multiple duties, but require you to set up the shop before using it.
Workstations help make tasks easier to do. Create storage at each machine for all the items and accessories used with it.
Make a list of uses or functions. Make a list of existing and planned tools and storage devices (Cabinets etc.) and other things that will occupy the space. Make a drawing to scale of the proposed space and each item that will go in it. Cut out the items and move them around in the garage to see how they can be arranged.
Consider getting storage of seasonal and yard items and bikes into another structure like a shed or accessory building.
Consider expanding your work area with a combination of tools on wheels, and a large door that opens to an adjacent covered and paved space. During good weather you can roll tools out there or park cars out there to give more garage work space.