One thing I preach is to make use of the area above your head. In my shop, I’ve installed cabinets on the walls that start a few inches over my head and run up to the ceiling. That way they don’t restrict my movements but still provide a lot of extra storage. I’ve also mounted a power bar to the bottom of the cabinets, which makes it really accessible and it can never be blocked. If your cabinets don’t go all the way up to the ceiling, on top is a great place to store long material. For ease of acces­sibility, smaller items go on the lower shelves while taller items go on the higher shelves.
You can also use Google image search to research a project. Unlike the PDF search, the image search provides a photo of what the project will look like, which is helpful in determining if you want to pursue building it. By doing an image search for how to build a step stool, you will have a ton of options that all lead to woodworking plans of various quality. (The how to part of these is important—otherwise you’ll just get pictures of step stools.)