I've always been a fan of food storage, but only in the last couple of years have I realized how many non-food items are super important to my happiness and wellbeing. So I have started trying to calculate how much of each thing I need, and to store a year's supply of it.
Carolyn Nicolaysen in Totally Ready blog said to keep track of how much toilet paper your family uses, and then use that figure to calculate a year's supply. I bought a package of Quilted Northern 12 "double rolls" and waited until we were out of toilet paper inside the house, then opened the package. It took us from Apr. 28 to May 19 to use it up, that is 22 days, that is about half a roll per day.
I am going to make sure I have at least 182 double-rolls of toilet paper (365 days X 1/2 roll per day), because I don't want to go without it.
(Of course, if we were stranded at home 100% of the time instead of going to work and school, we would use more, so I should include that in my calculations.)
I store food inside the house where it is airconditioned and heated. But paper goods don't need airconditioning, so here is how I store toilet paper and Kleenex and paper towels in my attic. Seth built these shelves in between the trusses.
