I gotta mention these envelopes again---I use these to put my old and current (and in between) projects in and just love them! I took a picture this time so you can see how cool they really are. They are clear plastic so I can see everything and have a snap enclosure. I use a label maker to label the pattern number, if it has one. And then label the name of the project and possibly who I am making it for. They expand a little as you can see in the second pic---so there is ample space for the pattern, fabric, notions, etc.
Take a look-see:
I bought these from Current Catalog online. You get 8 to a pkg and the top flaps are decorated with colorful designs. So, IMO that is a plus. The plastic is very sturdy--very had one rip and have had my first batch for over a year.
I stand them up in hanging file folders now (after moving things around) so I can easily find them since they 'stand' out so much :-)