I have a book for each of the two mints going. I get them through normal circulation.
I was hoarding the state quarters for several years. Every time I got one in change I would save it. It drove my wife crazy, because she saw it as money that was just sitting there doing nothing. This spring I cashed all the extras in for one of these:
http://www.willygoat.com/imagescatalog/Brinkmann/8.jpg
When I considered whether I would rather have a really nice smoker or a bunch of duplicate quarters, the decision was pretty easy.
I had a great thread going on the state quarters, but it's evidently been destroyed in the great database purge. I was dying to slap you with a REPOST on such a lame topic.