This is one I saw online, tried it, and it still working.

Want to keep your potatoes from sprouting "eyes" and getting soft? Throw an apple in the bag with them! The fumes from the apple keep the potatoes from sprouting - I bought three potatoes maybe in either mid-March or early April, and tried it - and as I have not felt compelled to eat potatoes* since then, and they are as good still as the day I bought them!


Amazing, right?

*Paul is only allowed limited potato consumption, so having a whole one at a meal would be bad.