Mark and I recently did some spring cleaning. Here is a storage idea that we use and love. I read about this in the book The Duggars: 20 and Counting by Michelle and Jim Bob Duggar.
1. Label your storage box with a number.
2. Write that same number on a note card. Next label where you will be storing this box.
3. On the other side of the notecard write everything that you put in the storage box. I suggest using a pencil so that way you can easily erase an item if you remove it from the box.
4. Put all of your finished notecards into a labeled notecard box. Now instead of digging through twenty boxes next time you need to find something, you can simply flip through a few notecards and go directly to the box you need.