Every time we open a box of film, we usually don't take into consideration the box that it came it. Before throwing away the box, take a closer look first. You might find something useful.
I don´t know how you do it, but when I buy film either in a shop or bulk on ebay, the first thing I do is to discard and throw away the boxes. They just take away too much room and besides the expiration date (which we lomographers don´t care about) carry no information not to be seen on the film canister itself.
So I rip them apart brutally and throw them away. Recently I bought eight boxes of Kodak VR 100 that were expired in 1997. The first thing I noticed were the retro boxes in Kodak’s trademark yellow. But never mind, the boxes had to go. When I ripped the second one apart I noticed that beside the usual bla-bla-barely-readable instructions there was a graphic inside.
I opend the third box carefully and found a nice graphic exposure guide inside it. Wow, I thought, that might become handy, not only due to it´s perfect size.
So when you rip your next film box open maybe take a closer look inside it. Otherwise, feel free to copy my free exposure guide.