I am able to have all of my PECS organized by each PEC. I have four tubs full of PECS. I have each tub sorted by category. I have two tubs for schedule icons, one tub for communication icons and one for miscellaneous.
I keep a small dollar bin in the front of the room where my staff and I throw PECS throughout the day. When I have a few minutes I can quickly put them away where they belong. I also have some of my higher student's help me organize these, and they enjoy it!