|I don't have a huge number of pattern magazines, but even my occasional purchases of Burda and La Mia Boutique need some organising, or I fear nothing would ever be made up from them. Here's what I do:
1. Keep the magazines together, in date order.
2. Once the pattern sheets are unstapled for tracing, they go in a plastic pocket, and are stored back in the relevant magazine.
3. and this I find the real key to success - Make a photocopy of the 2 pages of technical drawings, make sure the date is clear. These I put in a file, again in date order, and shelve alongside the magazines. Not only can I see the designs clearly (so I shouldn't be buying a pattern that is really similar to something I have already!) but I can also use these sheets for making notes of what interests me, whether I've traced it yet, if I have some fabric in mind, if a relevant review comes up on PR, etc.etc. These are all things I find are better stored somewhere other than in my unreliable memory!