I love the AAS boxes because they fit the cards exactly--no sliding around or cards falling over. But before I had these, I found the best thing that worked was the $1 Sterilite flip-top boxes:
The kids keep a folder with their supplies in their workboxes. Their folders contain all of the Word Banks and other pages from AAS, plus blank paper to write on for things like the Writing Station. I also keep some blank paper in case they run out, so we don't have to go looking for it, plus stickers to put on their progress charts. I prefer to do the Writing Station on paper so that I can keep them--sometimes they write cute things!
What are your best organizing tips?