If you don't want to destroy the magazines and still have room to store them in an accessible manner, I'd suggest creating an index or list of the articles of interest. Just create a list the articles of interest along with issue number and page number. Then you can scan / search the list when you're looking for something and retrieve the article. You can use whatever you like to create the list -- pen and paper or a software such as Word, Excel, or Evernote. You could get fancy and add tags or categories (eg, "Dry Flies", "Nymphs") to make search and sorting your list a little easier.