I've been using PatternFile software to organize my sewing pattern stash. Not sure how I feel about it, I'm still in the tedious part of getting all the data in the system. If the patterns are recent, it is painless because they are usually already in the system. I have a gob of out-of-print, er "vintage", patterns that take a bit more work to get the information.
I'm storing them in banker's boxes. I like the idea of using comic book boxes, but banker's boxes are cheaper and I can fit the larger vogue patterns in there too.
I'm up to 448. EEEEKS.