I have been know to say, "I have enough scrap clay to pave my drive way." It is true. I have a tendency to lose track of how much good clay I have. I am a very visual person and have repurposed a wood Pepsi box to keep unopened clay. I love my Pepsi box. It stands upright and each section holds five 2 ounce blocks of clay; it looks cool displayed like that. But once a block has been opened I tend to use part and then put it "somewhere"; Lord knows I would never want to put a opened pack in with the ones in my pretty, pretty Pepsi box. Like it has to be...perfect.
Now my scrap clay pile is really scrap clay rather than for something when I cannot find a home.
Hope you find this tip helpful. Clay On !!