If you are a crazy photographer and you keep your unexposed and used films together, and also have multiple cameras loaded at the same time, having a bit of discipline and organization can be a great idea.
I always carry several new rolls in my camera bag in order to always have available films. I carry them out of the little pot to have more space. So, to avoid unwanted advances, I bend the very end of the film and roll it back to hook into the roll and sta tight. This also helps the differentiation of new and used films.
Another idea is write the main subject down on the film as soon you unload your camera. You can make it with a pen for CDs. You can write if it is for x-pro, if you shoot it with a different ISO or even if it is redscale. If you want more organization, put its end date for helping yourself on the order of processing — It’ll be very helpful if you have the same habit that I have of having too many cameras loaded with films at the same time.
And how do you organize several cameras loaded with different films? I have the habit of always having 3 or 4 cameras with films inside, so it takes time to finish 1 roll. It’s simple: Put masking tapes on the back of your cameras and write the film names there. This way you’ll always know what is inside of each camera.
If you organize well, you’ll go far in the world of analogue photography!