I don't own many sewing patterns...around twenty, maybe. I keep them in a portable hanging file folder container. This method works well for me.
The patterns get tucked into the hanging files. All my Craft Apple Patterns go in one file, my dress patterns go in another, pants in another....blah blah blah.
The patterns that have already been opened and used are typically too big of a headache for me to try to fit back into their original packaging. Those I place in a manila envelope, and I tape the original to the front so I know what's inside.
Pants-along folks: there is now a pants-along flickr group if you'd like to share your creations. I know some of you are still sewing away. Take your time!!! Hope you're having fun! :)