To the left of the cabinet hangs my table saw infeed support arms, my table saw spline jig, multifunction hold down jig, and a dry erase board I made several years ago for my wife. We never put it to use in the house so I put it in my shop. Below that is a rolling mechanics tool box. I store all of my wrenches, sockets, and tools of that nature in it.
French cleats are a simple way to hang things on walls while allowing easy repositioning. One bevelled cleat is fastened to the wall and the other is fastened to whatever you want to hang. One catches the other and gravity does the rest. French cleats are commonly cut at 45 degrees but I prefer to cut mine at around 30 degrees. This makes them easier to lift off the wall (especially way up high) without sacrificing security.
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.)