Originally, I used to sort my A&A pieces (and pieces from similar games) by keeping them in ziplock plastic bags, with smaller bags inside larger ones to represent subcategories. It soon became too cumbersome to open bags-within-bags to reach whatever specific kind of piece I needed, so I switched to using translucent plastic tackle boxes with adjustable dividers. The box dimension I like the best among the many sizes available is 14" by 8.5" x 2" thick. I get them from the fishing equipment section of local hardware stores, and when necessary I’ve ordered extra dividers from the manufacturer. I apply white sticky labels to the narrow end of the boxes to identify them when they’re stacked for storage, and the lids are transparent enough for the contents to be easily identifiable when the boxes are spread out for use.