I found this mesh large panel with 21 deep double pockets that hangs behind the door. It's a great way to keep everything organized and close at hand. I don't remember now what the original intent was for the organizer (perhaps for shoes or something), but it works great for tools and supplies.
Also, as a teacher for 33 years, I accumulated lots of containers, mugs, baskets, you name it. I have re-purposed them and use a lot of those things to keep my supplies. As I sew I see these things and think about the kids that gave them to me. Some of the items have the children's name written under them. I have also used things from days gone by and recycled them (box purses from the days of decoupage, basket purses, my children's old lunch kits -- great for holding spools of thread, small scraps. I just need a larger room to keep all of this stuff in.