Many patterns that I am working from are hard copies rather than in pdf format. It is quicker to work from, but pdf are easier to adapt to new sizes (if somenone was intending to lose weight and be slimmer for instance). To keep my pieces together in one place I use kraft envelopes that are usually the size of indie patterns, and can hold the pieces as well as instructions. I bought mine here.
How do you make sure your patterns do not get damaged and make sure you can find them easily?