Several of my children have been very hands-on, so I've had an unusually large amount of stuff to keep track of. The others were bookworms. I had a large family and to keep my sanity we studied as much as we could together. These 2 things seemed to help me the most!
I had several bookcases that I sorted everything on. The ancients case had shelves for Egypt, Greece, Rome, Mesopotamia, China and etc. I kept movies, DvD's crafts, models, & books for me and kids together.
Same with cases for science , sorting astronomy shelves,nature studies, etc. I kept kits, books, biographies all age materials on the same shelf.
If I was going to teach a class using lots of things , I kept a spread sheet.
This was a big help & worth the time one year we did a giant unit study on geography. We used movies , novels, myths & poems, environments, cultural travel vidoes, cookbooks, scenic wonders books man made & natural, maps, you name it. I made 3 spread sheets based on Michael Palin's videos of everything we had and would borrow from the library.
So like when we traveled through Turkey , I knew what to cook, read , watch, print a map and where in what books to find what we needed.