I use comic book protectors to store my patterns, then tuck them away in a small filing cabinet after use. The comic book protecters come in two parts a backing board, (the white part), and the plastic sleave. I hate trying to stuff pattern pieces back in the original envelope so I just slide them behind the backing board and can still view my pattern. I love using vintage patterns which I feel need the extra protection and am very happy with this system.
How do you keep your patterns?