The simple French Cleat technique is a clever way to hang things on a wall, whether permanently (as with a cabinet) or temporarily (as with rearrangeable modules you can easily pull on or off). Here popular woodworking YouTuber Steve Ramsey uses it to add some order to a tool collection that's spun out of control. (And sure, the hyper-animated Ramsey seems nutty, but he's nutty to the tune of 56,000 subscribers.)

I was kind of surprised that he didn't slant the tops of the screwdriver holders towards the wall, to prevent the problem he addresses around 5:00, but his eventual solution seems to handle it fine. And that's part of the fun of watching maker videos anyway: Seeing what you would do, what you wouldn't do, and how different folks solve different problems.