I keep one example of each of my keepers in 2x2 (including American ones). They are alphabetized/labeled and out into shoeboxes. The rest go into a tool box with drawers, and are just loose. If I have any proof spares, they go into the box in a 2x2. I store my wheats and 1960-1974 memorials in a whitman folder (the memorials are just part of the album, so I just kept one and throw the rest back if they are not upgrades). I do the same with my Jefferson nickels (1938- 1960), my Kennedy halves (all of them, including proofs), and British halfpennies (King Edward VIII to Queen Elizabeth II). I store my spare wheats in paper rolls (they are not marked, but no one in my family deposits rolls, so no one would take them to the bank on accident). The rolls are then stored in plastic bags. I do the same with my pre-1960 nickel spares, NP quarter spares, and my Canadian cents. My other spare Canadian goes in tubes/rolls (the ones that are fit for spending in Canada; I am keeping all Canadian cents right now). My 2009 US dimes and nickels go in tubes. Finally, I keep any spares that are worth a lot of money in a wooden box from my grandfather (so that I don't trade the key dates accidentally to someone who wants a common date), along with some FS nickels and uncirculated clad that is at least 15-20 yrs. old that I find CRH.